Assigned ID Abstract Title Presenting Author First Presenting Author Accepted Presentation Category Sub-category Name Last Name Preference LBA-1 Phase 3 APACT trial of adjuvant nab-paclitaxel plus gemcitabine vs gemcitabine alone in patients with resected pancreatic : Updated 5-year overall survival Margaret Tempero Oral Presentation Clinical Early and Locally Advanced Disease

LBA-2 Selected Abstract Oral Presentation Clinical Hepatocellular Early and Locally Advanced Disease Metastatic Disease

LBA-3 Integrated analysis of cell free DNA BRAF mutant allele fraction and whole exome sequencing in BRAFV600E metastatic treated with BRAF - Elena Elez Oral Presentation Basic Colon Cancer Metastatic Disease antiEFGR +/- MEK inhibitors. LBA-4 Initial data from the phase 3 KEYNOTE-811 study of trastuzumab and chemotherapy with or without pembrolizumab for HER2-positive metastatic gastric or Yelena Yuriy Janjigian Oral Presentation Clinical Colon Cancer Biomarkers and Translational Research gastroesophageal junction (G/GEJ) cancer LBA-5 Phase Ib study of the anti-TIGIT antibody tiragolumab in combination with in patients with metastatic Zev Wainberg Oral Presentation Clinical Esophageal Cancer Metastatic Disease

O-1 Results from a global Phase 2 study of tislelizumab, an investigational PD-1 antibody, in patients with unresectable hepatocellular carcinoma Ghassan Abou-Alfa Oral Presentation Clinical Hepatocellular Carcinoma Others: PD-1 Inhibitor Monotherapy

O-2 Final overall survival in the phase 3 NETTER-1 study of lutetium-177-DOTATATE in patients with midgut neuroendocrine tumors Jonathan Strosberg Oral Presentation Clinical Bilary Tract Cancer Biomarkers and Translational Research

O-3 Characterization of KRAS mutation variants and prevalence of KRAS-G12C in gastrointestinal Mohamed Salem Oral Presentation Clinical Colon Cancer Biomarkers and Translational Research

O-4 Average cumulative relative dose of adjuvant chemotherapy is more important than average relative dose intensity for colorectal cancer survival, with implications Corinna Slawinski Oral Presentation Clinical Colon Cancer Screening/Prevention/Epidemiology for treating obese patients: The OCTOPUS consortium O-5 Frequency of minimal residual disease as measured by ctDNA in mismatch repair deficient tumors following curative resection Melissa Lumish Oral Presentation Others ( Including GIST and ) Metastatic Disease

O-6 alterations in ctDNA related to the resistance mechanism of anti-EGFR antibodies and clinical efficacy outcomes of anti-EGFR antibody rechallenge plus Naoki Takahashi Oral Presentation Clinical Colon Cancer Biomarkers and Translational Research trifluridine/tipiracil in metastatic colorectal cancer patients in WJOG8916G trial O-7 FOLFIRI ± napabucasin in patients with previously treated metastatic colorectal cancer: Overall survival results from the phase 3 CanStem303C study Manish A. Shah Oral Presentation Clinical Colon Cancer Metastatic Disease Others: Phase 3 trial

O-8 Selected Abstract Oral Presentation Clinical Colon Cancer Metastatic Disease

O-9 5-FU/LV + cetuximab + vemurafenib as maintenance therapy for BRAF-mutant (BRAFmut) metastatic colorectal cancer: Efficacy, safety, and exploratory biomarker Michel Ducreux Oral Presentation Clinical Colon Cancer Metastatic Disease findings from Cohort 1 of the MODUL trial O-10 ANCHOR CRC: Results from a single-arm, phase 2 study of encorafenib, binimetinib plus cetuximab in previously untreated BRAF V600E–mutant metastatic Eric Van Cutsem Oral Presentation Clinical Colon Cancer Metastatic Disease colorectal cancer O-11 Monitoring molecular residual disease by circulating tumor DNA in resectable colorectal cancer: Molecular subgroup analyses of a prospective observational study Hiromichi Shirasu Oral Presentation Clinical Colon Cancer Biomarkers and Translational Research GALAXY in CIRCULATE-Japan Surgery

O-12 Phase II study of preoperative chemoradiotherapy plus avelumab in patients with locally advanced rectal cancer: The AVANA study Lisa Salvatore Oral Presentation Clinical Rectal Cancer Early and Locally Advanced Disease

O-13 Gut microbiome to predict survival time in advanced gastric cancer treated with nivolumab: The DELIVER trial (JACCRO GC-08) Yu Sunakawa Oral Presentation Clinical Gastric Cancer Biomarkers and Translational Research

O-14 Exploratory biomarker analysis of trastuzumab deruxtecan in DESTINY-Gastric01, a randomized, phase 2, multicenter, open-label study in patients with HER2- Kohei Shitara Oral Presentation Clinical Gastric Cancer Biomarkers and Translational Research positive or -low advanced gastric or gastroesophageal junction SO-1 The impact of COVID-19 on daily practice patterns in the third-line setting for patients with metastatic colorectal cancer: Results of a real-world survey Gerald Prager Short Oral Presentation Clinical Colon Cancer Others: Practice Patterns

SO-2 Pancreatic cancer in HIV versus non-HIV population: Analysis of demographics, outcomes and healthcare utilization from a national sample Syed Ali Amir Sherazi Short Oral Presentation Clinical Pancreatic Cancer Screening/Prevention/Epidemiology

SO-3 Treatment sequences and prognostic factors in metastatic pancreatic ductal adenocarcinoma: Univariate and multivariate analyses of a real-world study in Europe Julien Taieb Short Oral Presentation Clinical Pancreatic Cancer Metastatic Disease

SO-4 Progression-free survival in patients With with FGFR2 fusions or rearrangements: A FIGHT-202 post-hoc analysis of prior systemic therapy Ghassan Abou-Alfa Short Oral Presentation Clinical Bilary Tract Cancer Others: Post-hoc analysis response SO-5 Tumor inflammation and proliferative status as biomarkers in gastroesophageal adenocarcinoma Sarbajit Mukherjee Short Oral Presentation Clinical Gastric Cancer Biomarkers and Translational Research

SO-6 Microarchitectural changes in regional lymph nodes after chemotherapy in oesophageal cancer: Results from the UK MRC OE02 trial Maximilian Kloft Short Oral Presentation Clinical Esophageal Cancer Biomarkers and Translational Research Pathology

SO-7 The prognostic and predictive role of preoperative chemotherapy sensitivity in gastric adenocarcinoma: A study of national cancer database Lei Deng Short Oral Presentation Clinical Gastric Cancer Early and Locally Advanced Disease Others: Chemotherapy

SO-8 Health-related quality of life in patients treated with pembrolizumab for microsatellite instability-high/mismatch repair deficient advanced solid tumors: Results Michele Maio Short Oral Presentation Others ( Including GIST and Anal Cancer ) Biomarkers and Translational Research from the KEYNOTE-158 study SO-9 Analysis of the immune-related endpoints of the mismatch repair–deficient non-endometrial solid cohort from the GARNET study Thierry André Short Oral Presentation Others ( Including GIST and Anal Cancer ) Others: immuno-/immunotherapy

SO-10 An open-label, multi-centre, phase Ib/II study of PI3Kβ selective inhibitor GSK2636771 administered in combination with paclitaxel in patients with advanced Minkyu Jung Short Oral Presentation Clinical Gastric Cancer Metastatic Disease gastric cancer having alterations in PI3K/Akt pathway SO-11 KISIMA-01 trial: Safety, tolerability and immunogenicity of ATP128 with or without ezabenlimab (BI 754091) in patients with stage IV colorectal cancer – Scott Kopetz Short Oral Presentation Clinical Colon Cancer Biomarkers and Translational Research preliminary results from a Phase 1b study Metastatic Disease

SO-12 Updated safety, efficacy, and PK results from an open-label, multicenter, phase I/II study of avapritinib in Chinese patients with unresectable or metastatic Jian Li Short Oral Presentation Others ( Including GIST and Anal Cancer ) Others: phase 1/2 clinical trials gastrointestinal stromal tumors SO-13 KRAS-G12C mutations in a Nordic cohort of 1441 metastatic colorectal cancer patients Emerik Osterlund Short Oral Presentation Clinical Colon Cancer Biomarkers and Translational Research Metastatic Disease

SO-14 The prognostic impact of KRAS G12C mutation in patients with metastatic colorectal cancer: A multicenter retrospective observational study Yuki Matsubara Short Oral Presentation Clinical Colon Cancer Metastatic Disease Assigned ID Abstract Title Presenting Author First Presenting Author Accepted Presentation Category Sub-category Name Last Name Preference SO-15 Quality of life and physical functioning in older patients with metastatic colorectal cancer receiving palliative chemotherapy: The randomized NORDIC9-study Gabor Liposits Short Oral Presentation Clinical Colon Cancer Metastatic Disease

SO-16 Quality of life in Finnish metastatic colorectal cancer patients actively treated with the aim of maximizing resection and/or local ablative therapy (RAXO-study Pia Osterlund Short Oral Presentation Clinical Colon Cancer Metastatic Disease NCT01531595) SO-17 The global POLAR program: Top-line results of placebo-controlled studies of calmangafodipir on top of modified FOLFOX6 to prevent chemotherapy-induced Per Pfeiffer Short Oral Presentation Clinical Colon Cancer Early and Locally Advanced Disease peripheral neuropathy Screening/Prevention/Epidemiology

SO-18 Safety and efficacy of trifluridine/tipiracil in previously treated metastatic colorectal cancer: Final results according to duration of treatment from the phase IIIb, Julien Taieb Short Oral Presentation Clinical Colon Cancer Metastatic Disease international, open-label, early-access PRECONNECT study SO-19 A multicenter phase Ⅱ trial of trifluridine/tipiracil in combination with cetuximab in RAS wild-type metastatic colorectal cancer patients refractory to prior anti- Toshiki Masuishi Short Oral Presentation Clinical Colon Cancer Metastatic Disease EGFR antibody therapy: The WJOG8916G trial SO-20 Prospective validation of Ang-2 and Tie-2 plasma levels as predictors of benefit from in metastatic colorectal cancer patients: REGOLAND study. Carlotta Antoniotti Short Oral Presentation Clinical Colon Cancer Biomarkers and Translational Research

SO-21 Impact of timing of perioperative chemotherapy on survival outcomes among patients with colorectal liver metastases: A propensity score matching of the national Firas Baidoun Short Oral Presentation Clinical Colon Cancer Metastatic Disease cancer database SO-22 Importance order of risk factors for mortality in colon cancer stage II: A multivariate adaptive regression spline (MARS) analysis Jesus Fabregas Short Oral Presentation Clinical Colon Cancer Biomarkers and Translational Research Early and Locally Advanced Disease

SO-23 The genomic temporal heterogeneity of circulating tumor DNA in metastatic colorectal cancer under first-line treatment Rui-Hua Xu Short Oral Presentation Clinical Colon Cancer Biomarkers and Translational Research Metastatic Disease

SO-24 Circulating tumor DNA variant allelic fraction as a surrogate for disease burden estimation in patients with RAS wild-type metastatic colorectal cancer: A secondary Paolo Manca Short Oral Presentation Clinical Colon Cancer Biomarkers and Translational Research endpoint of the VALENTINO study Metastatic Disease

SO-25 Global rise in early-onset colorectal cancer: An association with antibiotic consumption? Sarah Perrott Short Oral Presentation Basic Colon Cancer Screening/Prevention/Epidemiology

SO-26 In-silico Lynch syndrome-related neoantigens prediction for a dendritic cell-based cancer prevention vaccine Cristina Bayó Short Oral Presentation Basic Colon Cancer Biomarkers and Translational Research Screening/Prevention/Epidemiology

SO-27 Nivolumab plus low-dose in previously treated patients with microsatellite instability-high/mismatch repair-deficient metastatic colorectal cancer: 4- Thierry André Short Oral Presentation Clinical Colon Cancer Metastatic Disease year follow-up from CheckMate 142 SO-28 Effect of prior bevacizumab treatment in BRAF V600E-mutant metastatic colorectal cancer: Overall survival with encorafenib + cetuximab +/- binimetinib in Dan Aderka Short Oral Presentation Clinical Colon Cancer Metastatic Disease BEACON CRC SO-29 Efficacy and safety of larotrectinib in patients with tropomyosin receptor kinase fusion-positive : An expanded dataset Valentina Boni Short Oral Presentation Others ( Including GIST and Anal Cancer ) Metastatic Disease

SO-30 Efficacy and safety of neoadjuvant short-course radiation followed by mFOLFOX-6 plus avelumab for locally-advanced rectal adenocarcinoma: Averectal study Ali Shamseddine Short Oral Presentation Clinical Rectal Cancer Early and Locally Advanced Disease RadioTherapy

SO-31 ASPEN-01: A phase 1 study of ALX148, a CD47 blocker, in combination with trastuzumab, and paclitaxel in patients with second-line HER2-positive Hyun Cheol Chung Short Oral Presentation Clinical Gastric Cancer Metastatic Disease advanced gastric or gastroesophageal junction cancer Others: Immuno Oncology

PD-1 MOUNTAINEER: Open-label, phase 2 study of tucatinib combined with trastuzumab for HER2-positive metastatic colorectal cancer (SGNTUC-017, trial in progress) Salvatore Siena Poster Discussion Clinical Colon Cancer Trial in Progress

PD-2 Final result of phase IB study of regorafenib and nivolumab in mismatch repair proficient advanced refractory colorectal cancer Richard Kim Poster Discussion Clinical Colon Cancer Metastatic Disease

PD-3 Impact of RAS status, prior , age, and gender on the activity of aflibercept plus FOLFIRI in patients with metastatic colorectal cancer: Real-world Roger von Moos Poster Discussion Clinical Colon Cancer Metastatic Disease data from the QoLiTrap study PD-4 A phase I trial of trifluridine/tipiracil in combination with nanoliposomal irinotecan in advanced GI cancers Olatunji Alese Poster Discussion Clinical Colon Cancer Biomarkers and Translational Research Metastatic Disease

PD-5 Retrospective comparative analysis of K-ras G12C vs other K-ras mutations in metastatic colorectal cancer patients treated with first-line chemotherapy doublet + Riccardo Giampieri Poster Discussion Clinical Colon Cancer Biomarkers and Translational Research bevacizumab Metastatic Disease

PD-6 Prediction of patients at high risk of upper gastrointestinal cancer for endoscopy using artificial intelligent technology Yiguang Lin Poster Discussion Basic Esophageal Cancer Screening/Prevention/Epidemiology Others: Use of Artificial Intelligence

P-1 Health-related quality of life of rectal cancer survivors treated with curative intent André Ferreira Poster Presentation Clinical Rectal Cancer Early and Locally Advanced Disease

P-2 First-line atezolizumab plus bevacizumab versus in hepatocellular carcinoma: A cost-effectiveness analysis Sik Kwan Chan Poster Presentation Clinical Hepatocellular Carcinoma Others: Economic evaluation

P-3 Gastric cancer: 10-year survival Oleg Kshivets Poster Presentation Clinical Gastric Cancer Surgery

P-4 Prognostic and therapeutic values of tumor-infiltrating lymphocytes in localized colon cancer Sonia Ben Nasr Poster Presentation Clinical Colon Cancer Early and Locally Advanced Disease

P-5 The use of complementary and alternative medicine among colorectal cancer patients in Tunisia Sonia Ben Nasr Poster Presentation Clinical Colon Cancer Early and Locally Advanced Disease

P-6 Spatio-temporal distribution pattern of pancreatic cancer mortality rate in Peru between 2003-2017 Claudio Flores Poster Presentation Basic Pancreatic Cancer Screening/Prevention/Epidemiology

P-7 How much can GIT cancer patients afford for effective and safe treatment? Rasha Aboelhassan Poster Presentation Others ( Including GIST and Anal Cancer ) Screening/Prevention/Epidemiology

P-8 Nutritional status among colorectal cancer patients in Tunisia Sonia Ben Nasr Poster Presentation Clinical Colon Cancer Early and Locally Advanced Disease

P-9 Prognostic role of preoperative inflammation parameters in predicting postoperative complications of colorectal cancer surgery. Sonia Ben Nasr Poster Presentation Clinical Colon Cancer Biomarkers and Translational Research Early and Locally Advanced Disease Assigned ID Abstract Title Presenting Author First Presenting Author Accepted Presentation Category Sub-category Name Last Name Preference P-10 Prevalence and risk factors of chronic neuropathy in 225 colorectal cancer patients treated with oxaliplatin-based regimens in Tunisia Sonia Ben Nasr Poster Presentation Clinical Colon Cancer Early and Locally Advanced Disease

P-11 GAME score in patients with liver metastases from colorectal cancer Wala Ben Kridis Poster Presentation Basic Colon Cancer Metastatic Disease

P-12 Long intergenic non- coding RNA 1094 regulates the progression of gastric cancer Ouyang Ge Poster Presentation Basic Gastric Cancer Biomarkers and Translational Research

P-13 Efficacy of FOLFOX4 regimen with advanced hepatocellular carcinoma and prognostic factors for survival Chawalit Chayangsu Poster Presentation Clinical Hepatocellular Carcinoma Metastatic Disease

P-14 The predictive value of alkaline phosphatase and lactate dehydrogenase for overall survival in patients with pancreatic cancer Aicha Bengueddach Poster Presentation Clinical Pancreatic Cancer Pathology Surgery

P-15 Diagnostic potential of erythrocyte and serum fatty acids in spotting adenomatous polyps and identifying the early stages of colorectal cancer depending on tumor Margarita Kruchinina Poster Presentation Basic Colon Cancer Biomarkers and Translational Research localization Early and Locally Advanced Disease

P-16 How does reinduction of first-line chemotherapy in patients with metastatic colorectal cancer impact outcomes? Experience from the University Hospital for Mirjana Pavlovic Poster Presentation Clinical Colon Cancer Metastatic Disease Tumors, Zagreb, Croatia P-17 CT colonography: A minimally invasive screening option for colorectal cancer Jagmeet Grewal Poster Presentation Clinical Colon Cancer Screening/Prevention/Epidemiology

P-18 Phase Ib study of niraparib plus tebotelimab in patients with advanced or metastatic gastric cancer after prior treatment failure Ruihua Xu Poster Presentation Clinical Gastric Cancer Early and Locally Advanced Disease Metastatic Disease

P-19 A multicentred phase II clinical trial on 90-resin microspheres followed by gemcitabine- for treatment of locally advanced intra-hepatic Stephen Lam Chan Poster Presentation Clinical Bilary Tract Cancer Early and Locally Advanced Disease cholangiocarcinoma P-20 Concurrent chemo-radiotherapy in anal squamous cell : A 10-year retrospective review of a tertiary centre experience Abdelfattah Elmasry Poster Presentation Others ( Including GIST and Anal Cancer ) Early and Locally Advanced Disease RadioTherapy

P-21 Real-world outcomes in patients with advanced or metastatic gastric adenocarcinoma in the Daniel Beachler Poster Presentation Clinical Gastric Cancer Screening/Prevention/Epidemiology

P-22 Role of timing to laparoscopic or robotic surgery after neoadjuvant chemoradiotherapy for rectal cancer: The TiMiSNAR trial Igor Monsellato Poster Presentation Clinical Rectal Cancer Surgery Trial in Progress

P-23 Experience of concurrent chemoradiotherapy for pancreatic cancer in a large university hospital Gemma Searle Poster Presentation Clinical Pancreatic Cancer RadioTherapy

P-24 A prospective phase 1b dose de-escalation open-label clinical study to evaluate the safety and efficacy of sorafenib with metformin and atorvastatin in advanced Prabhat Bhargava Poster Presentation Clinical Hepatocellular Carcinoma Others: DRUG REPOSITIONING hepatocellular carcinoma (SMASH) P-25 A review of circulating exosomal biomarkers in the diagnosis of pancreatic cancer Menazir Sha Poster Presentation Clinical Pancreatic Cancer Biomarkers and Translational Research

P-26 Regorafenib versus as second-line treatment after sorafenib for unresectable hepatocellular carcinoma: Matching-adjusted indirect comparison Andrea Casadei Gardini Poster Presentation Clinical Hepatocellular Carcinoma Metastatic Disease analysis P-27 The efficacy and safety of XELOX/SOX plus bevacizumab as neoadjuvant chemotherapy for locally advanced rectal cancer compared with XELOX/SOX: A Nanako Sakaguchi Poster Presentation Clinical Colon Cancer Early and Locally Advanced Disease retrospective study P-28 Exploratory analysis of patients with gastric/GEJ adenocarcinoma with or without liver from the phase 3 RAINBOW study Takatsugu Ogata Poster Presentation Clinical Gastric Cancer Metastatic Disease

P-29 Pancreatic cancer during the COVID-19 pandemic: A high-volume Polish centre experience Marek Durlik Poster Presentation Clinical Pancreatic Cancer Surgery

P-30 Is vitamin D status known in patients with advanced pancreatic adenocarcinoma? Esther Uña Cidón Poster Presentation Clinical Pancreatic Cancer Metastatic Disease

P-31 Real-world efficacy and safety of trifluridine/tipiracil plus bevacizumab for patients with metastatic colorectal cancer refractory to standard therapies Nieves Martínez Lago Poster Presentation Clinical Colon Cancer Metastatic Disease

P-32 SARS-CoV-2 pandemic and delayed presentation of gastrointestinal cancer patients: A retrospective evaluation and the impact on clinical outcome Budhi Ida Bagus Poster Presentation Clinical Colon Cancer Surgery

P-33 Results of initial DPYD screening for cancer patients receiving fluoropyrimidines Matilde Bolaños Naranjo Poster Presentation Others ( Including GIST and Anal Cancer ) Screening/Prevention/Epidemiology

P-34 Real-world efficacy and safety of immune checkpoint inhibitors in microsatellite unstable or mismatch repair deficient gastrointestinal tumors Nieves Martínez Lago Poster Presentation Clinical Colon Cancer Metastatic Disease Pathology

P-35 HGCSG1901: A retrospective cohort study evaluating the safety and efficacy of S-1 and irinotecan plus bevacizumab in patients with metastatic colorectal cancer: Ken Ito Poster Presentation Clinical Colon Cancer Metastatic Disease Analysis of first-line treatment. P-36 Pancreatic cancer in times of the pandemic Esther Una Cidon Poster Presentation Clinical Pancreatic Cancer Early and Locally Advanced Disease

P-37 SGNTUC-019: Phase 2 basket study of tucatinib and trastuzumab in previously treated solid tumors with HER2 alterations: cancer cohort (trial in Tanios Bekaii-Saab Poster Presentation Clinical Bilary Tract Cancer Trial in Progress progress) P-38 Unmet needs and concerns of Russian patients with CRC: Analysis of Russian internet postings Alexandr Krotkevich Poster Presentation Clinical Colon Cancer Early and Locally Advanced Disease Metastatic Disease

P-39 The role of the prognostic nutritional index in predicting survival in advanced hepatocellular carcinoma treated with regorafenib Margherita Rimini Poster Presentation Clinical Hepatocellular Carcinoma Biomarkers and Translational Research

P-40 versus sorafenib as first-line treatment in hepatocellular carcinoma: A multi-institutional matched case-control study Margherita Rimini Poster Presentation Clinical Hepatocellular Carcinoma Biomarkers and Translational Research

P-41 Lipopolysaccharides promote metastasis via acceleration of glycolysis by the nuclear factor-κB/Snail/Hexokinase3 signaling axis in colorectal cancer xuesong Wu Poster Presentation Basic Colon Cancer Metastatic Disease Pathology

P-42 Reduced-dose of doublet chemotherapy combined with anti-EGFR antibodies as treatment option in vulnerable older patients with metastatic colorectal cancer: A Gerardo Rosati Poster Presentation Clinical Colon Cancer Metastatic Disease retrospective cohort study Assigned ID Abstract Title Presenting Author First Presenting Author Accepted Presentation Category Sub-category Name Last Name Preference P-43 C677T and A1298C MTHFR gene polymorphisms and response to fluoropyrimidine-based chemotherapy in mestizo patients with metastatic colorectal cancer. Allan Ramos-Esquivel Poster Presentation Clinical Colon Cancer Biomarkers and Translational Research

P-44 Expression and clinical significance of B cell translocation gene 2 in esophageal Wanpeng Wang Poster Presentation Basic Esophageal Cancer RadioTherapy

P-45 An open-label, phase 2 study of patritumab deruxtecan in patients with previously treated advanced/metastatic colorectal cancer Kanwal Raghav Poster Presentation Clinical Colon Cancer Metastatic Disease Trial in Progress

P-46 Integrated transcriptomics and the exploration of cancer-promoting CDKN3 in esophageal squamous cell cancer Yan Pan Poster Presentation Basic Gastric Cancer Biomarkers and Translational Research

P-47 5-fluorouracil bolus use in infusional regimens among oncologists: A survey by Brazilian Group of Gastrointestinal Tumors Renata Peixoto Poster Presentation Clinical Colon Cancer Early and Locally Advanced Disease Metastatic Disease

P-48 Study of paclitaxel and ramucirumab as second-line therapy after failure of FOLFOX-6 regimen in metastatic stomach carcinoma patients Varun Goel Poster Presentation Clinical Gastric Cancer Metastatic Disease

P-49 Oesophageal neuroendocrine carcinoma: Retrospective evaluation of outcomes from a UK tertiary centre Michael Tilby Poster Presentation Clinical Neuroendocrine Tumors Early and Locally Advanced Disease Metastatic Disease

P-50 Prognostic factors in patients receiving trifluridine/tipiracil for refractory metastatic colorectal cancer in the real-life setting: The ROS study Pilar García-Alfonso Poster Presentation Clinical Colon Cancer Metastatic Disease

P-51 Baseline characteristics of patients enrolled in the CAPSTAN study: A European retrospective study in BRAFV600E-mutant metastatic colorectal cancer patients Erika Martinelli Poster Presentation Clinical Colon Cancer Metastatic Disease

P-52 Overall survival with cetuximab every 2 weeks vs standard once-weekly administration schedule for first-line treatment of RAS wild-type metastatic colorectal Stefan Kasper Poster Presentation Others ( Including GIST and Anal Cancer ) Metastatic Disease cancer in patients with left- and right-sided primary tumor location P-53 Prognostic factors for relapse in resected gastroenteropancreatic neuroendocrine : A and meta-analysis Rachel Broadbent Poster Presentation Clinical Neuroendocrine Tumors Early and Locally Advanced Disease Surgery

P-54 Higher muscle mass is associated with better response to concurrent neoadjuvant chemoradiotherapy in rectal cancer patients Kiril Zhelev Poster Presentation Basic Rectal Cancer RadioTherapy

P-55 Constructing hybrid control for the Morpheus metastatic colorectal cancer trial using Imblaze370 historical trial data Neil Segal Poster Presentation Clinical Colon Cancer Metastatic Disease Others: contemporary trial design

P-56 A multicenter prospective translational study using circulating tumor DNA to identify acquired genomic alterations in recurrent gastric or gastroesophageal Hiroyuki Takeda Poster Presentation Clinical Gastric Cancer Trial in Progress junction adenocarcinoma in patients who received curative-intent treatment (Liquid-GEAR) P-57 US real-world ramucirumab and immune checkpoint inhibitor treatment sequences in advanced gastric, gastroesophageal junction, or esophageal cancer Julie Beyrer Poster Presentation Clinical Gastric Cancer Metastatic Disease Others: real-world data

P-58 Encorafenib and cetuximab in patients with metastatic, BRAF V600E-mutated, colorectal carcinoma: A multi-centric, multi-national, prospective, longitudinal, non- Sebastian Stintzing Poster Presentation Clinical Colon Cancer Trial in Progress interventional study in Germany and Austria – BERING CRC P-60 Doxycycline as preventive treatment of skin toxicity in patients with metastatic colorectal cancer treated with an anti-EGFR and chemotherapy Patricia Ramirez Daffos Poster Presentation Clinical Colon Cancer Metastatic Disease

P-61 Relatlimab + nivolumab in patients with advanced hepatocellular carcinoma who are naive to immuno-oncology therapy but progressed on tyrosine kinase Bruno Sangro Poster Presentation Clinical Hepatocellular Carcinoma Metastatic Disease inhibitors, a phase 2, randomized, open-label study: RELATIVITY-073 Trial in Progress

P-62 Overall survival of patients with pancreatic cancer Claudio Flores Poster Presentation Basic Pancreatic Cancer Screening/Prevention/Epidemiology

P-63 MATTERHORN: A phase 3 study of efficacy and safety of neoadjuvant-adjuvant durvalumab and FLOT chemotherapy in resectable gastric and gastroesophageal Yelena Yuriy Janjigian Poster Presentation Clinical Gastric Cancer Trial in Progress junction cancer P-64 The impact of sarcopenia on overall survival among cholangiocarcinoma patients: A systematic review and meta-analysis Jeannette Tandiono Poster Presentation Basic Biliary Tract Cancer Others: Prognostic Factor

P-65 Expression of TIMP-1 level as a diagnostic and prognostic factor in colon cancer patients: A systematic review Jeannette Tandiono Poster Presentation Basic Colon Cancer Biomarkers and Translational Research

P-66 Experience in our center of bone events not related to the disease in patients with locally advanced or metastatic adenocarcinoma of the Inmaculada Gallego Jimenez Poster Presentation Clinical Pancreatic Cancer Metastatic Disease

P-67 Prognostic implication of HER2 overexpression in surgically treated patients with gastric cancer Erkhembayar Enkhbat Poster Presentation Clinical Gastric Cancer Biomarkers and Translational Research Surgery

P-68 Response to neoadjuvant chemotherapy in gastric adenocarcinoma and gastroesophageal junction adenocarcinoma with FLOT-regimen in our setting Clara Garcia Grove Poster Presentation Clinical Gastric Cancer Early and Locally Advanced Disease Pathology

P-69 Intensive follow-up program and oncological outcomes of 278 biliary tract cancer patients after curative intent surgery: A single-center retrospective experience. Alessandro Rizzo Poster Presentation Clinical Bilary Tract Cancer Early and Locally Advanced Disease Surgery

P-70 First-in-human study of highly selective FGFR2 inhibitor, RLY-4008, in patients with intrahepatic cholangiocarcinoma and other advanced solid tumors Lipika Goyal Poster Presentation Basic Biliary Tract Cancer Trial in Progress

P-71 KRYSTAL-10: A randomized phase 3 study of adagrasib (MRTX849) in combination with cetuximab vs chemotherapy in patients with previously treated advanced Josep Tabernero Poster Presentation Clinical Colon Cancer Trial in Progress colorectal cancer with KRASG12C mutation P-72 A patient preference study on risk thresholds to switch between daily tablets and biweekly infusions in second-line treatment for advanced hepatocellular Neehar Parikh Poster Presentation Clinical Hepatocellular Carcinoma Metastatic Disease carcinoma P-73 The role of site of metastatic resection in metastatic colorectal cancer patients: A mono-institutional cohort study Floriana Camarda Poster Presentation Clinical Colon Cancer Metastatic Disease

P-74 The impact of first-line chemotherapy in elderly patients with advanced pancreatic cancer: A mono-institutional retrospective study Maria Grazia Maratta Poster Presentation Clinical Pancreatic Cancer Metastatic Disease

P-75 Impact of an educational activity on the knowledge of oncologists regarding the latest clinical trial data on HER2-directed therapies for gastric and colorectal cancer Nabil Dorkhom Poster Presentation Basic Gastric Cancer Others: Continuing Medical Education Assigned ID Abstract Title Presenting Author First Presenting Author Accepted Presentation Category Sub-category Name Last Name Preference P-76 Effect of educational activity on the knowledge of oncologists regarding the latest clinical trial data investigating immunotherapy combination regimens for the Nabil Dorkhom Poster Presentation Basic Hepatocellular Cancer Others: Continuing Medical Education frontline treatment of patients with unresectable HCC P-77 Risk factors and clinical outcomes of post-gastrectomy sarcopenia newly developed after curative resection for gastric cancer Beom Jin Kim Poster Presentation Clinical Gastric Cancer Others: Nutrition

P-78 Post hoc analysis in patients with unresectable hepatocellular carcinoma who progressed to Child-Pugh B liver function in the phase 3 REFLECT study of lenvatinib Jasmine Huynh Poster Presentation Basic Hepatocellular Cancer Others: Post hoc analysis vs sorafenib P-79 HGCSG1901: A retrospective cohort study evaluating the safety and efficacy of S-1 and irinotecan plus bevacizumab in patients with metastatic colorectal cancer: Ayumu Yoshikawa Poster Presentation Clinical Colon Cancer Metastatic Disease Analysis of second-line treatment after anti-EGFR antibody P-80 Sorafenib in extended patient populations in real-world clinical practice: Baseline characteristics from OPTIMIS and GIDEON Markus Peck-Radosavljevic Poster Presentation Clinical Hepatocellular Carcinoma Early and Locally Advanced Disease Metastatic Disease

P-81 HGCSG1901: A retrospective cohort study evaluating the safety and efficacy of S-1 and irinotecan plus bevacizumab in patients with metastatic colorectal cancer: Shiho Kaneko Poster Presentation Clinical Colon Cancer Metastatic Disease Analysis of second-line treatment P-82 Impact of type 2 mellitus in overall survival and clinical features of Latin patients with colorectal cancer: A 15-year follow-up German Calderillo-Ruiz Poster Presentation Clinical Colon Cancer Screening/Prevention/Epidemiology

P-83 The efficacy of chemotherapy for gastric cancer with early recurrence during or after adjuvant S 1 Koshi Kumagai Poster Presentation Clinical Gastric Cancer Metastatic Disease

P-84 Genotype-fenotype correlation in patients with Lynch syndrome and colorectal cancer Jose Angel Garcia-Cuesta Poster Presentation Basic Colon Cancer Screening/Prevention/Epidemiology Others: Hereditary CCR

P-85 Relationship between microsatellite instability and neoadjuvant chemotherapy response in gastric or gastroesophageal junction cancer: A meta-analysis Selin Akturk Esen Poster Presentation Clinical Gastric Cancer Early and Locally Advanced Disease

P-86 The importance of sphingosine kinase 1 isoform expression in the gut-liver axis Hongjie Chen Poster Presentation Basic Hepatocellular Cancer Biomarkers and Translational Research

P-87 Real-world data of nivolumab in advanced hepatocellular carcinoma: A multi-centric and retrospective study Mariana Sardinha Poster Presentation Clinical Hepatocellular Carcinoma Metastatic Disease

P-88 Sorafenib for hepatocellular carcinoma in real life Esther Una Cidon Poster Presentation Clinical Hepatocellular Carcinoma Others: therapy

P-89 The correlation between adverse events and survival benefits of donafenib in the first-line treatment of advanced hepatocellular carcinoma Feng Bi Poster Presentation Clinical Hepatocellular Carcinoma Metastatic Disease

P-90 Combined high expression of MAP17 and fascin-1 in colorectal cancer: Targeted therapy in need? Athanasios Tampakis Poster Presentation Basic Colon Cancer Biomarkers and Translational Research

P-91 Safety and efficacy of perioperative FLOT in elderly patients: Real-world data Mafalda Baleiras Poster Presentation Clinical Gastric Cancer Biomarkers and Translational Research Early and Locally Advanced Disease

P-92 The diagnostic process and the role of gastrointestinal specialists Simone Leyden Poster Presentation Clinical Neuroendocrine Tumors Others: NET diagnostic process

P-93 The characteristics and prognosis of extragastrointestinal stromal tumors: A single center retrospective analysis of 31 patients Mingchun Mu Poster Presentation Others ( Including GIST and Anal Cancer ) Pathology Others: prognosis

P-94 Unicentric real-world data from esophageal cancer neoadjuvant treatment according to the CROSS trial protocol Joana Mendonça Poster Presentation Clinical Esophageal Cancer Early and Locally Advanced Disease RadioTherapy

P-95 EV-202: An open-label, multicenter, phase 2 study of enfortumab vedotin in patients with previously treated locally advanced or metastatic solid tumors, including Kei Muro Poster Presentation Clinical Gastric Cancer Trial in Progress upper gastrointestinal cancers P-96 Analysis of three biographical times of disease in the IMbrave 150 study: A new measure to assess clinical effect Eduardo Ceballos Barbancho Poster Presentation Clinical Hepatocellular Carcinoma Metastatic Disease

P-97 Updated results of HGCSG1603: a phase 2 trial of ramucirumab plus irinotecan combination therapy as second-line treatment for patients with advanced gastric Michio Nakamura Poster Presentation Clinical Gastric Cancer Metastatic Disease cancer P-98 A single-arm study of plus neoadjuvant chemotherapy followed by resection in patients with locally advanced colorectal adenocarcinoma Tao Zhang Poster Presentation Clinical Rectal Cancer Early and Locally Advanced Disease

P-99 Circulating RNA detection, circulating tumor cells count, and molecular tumor profiling in a cohort of untreated metastatic colorectal cancer: A prospective Manuel Valladares-Ayerbes Poster Presentation Clinical Colon Cancer Metastatic Disease multicenter ancillary study to the randomized VISNÚ trials P-100 A phase II study of first-line chemotherapy initiating FOLFIRI+cetuximab and switching to FOLFIRI+bevacizumab according to early tumor shrinkage at 8 weeks in Hirokazu Shoji Poster Presentation Clinical Colon Cancer Metastatic Disease RAS wild-type metastatic colorectal cancer: HYBRID trial P-101 Survival of early-onset gastric signet ring cell carcinoma in the Korean population between 2010 and 2015: Analysis of the Korean central cancer registry database Hee Man Kim Poster Presentation Clinical Gastric Cancer Screening/Prevention/Epidemiology

P-102 The importance of maintenance chemotherapy in the first and second lines of treatment of metastatic colorectal cancer Danila Gridnev Poster Presentation Clinical Colon Cancer Metastatic Disease

P-103 Associations between quality-of-life, symptom burden, and demographic characteristics in long-term esophageal and gastroesophageal junction cancer survivors Erin McGillivray Poster Presentation Clinical Esophageal Cancer Others: Survivorship

P-104 Risk of and in a real-world data cohort of chemotherapy-treated patients with metastatic gastric or gastroesophageal junction adenocarcinoma by Stefan de Vogel Poster Presentation Clinical Gastric Cancer Metastatic Disease medical history of gastrectomy P-105 POLO: patient-centred outcomes with maintenance olaparib in patients with a germline BRCA mutation and metastatic pancreatic cancer Hedy Kindler Poster Presentation Clinical Pancreatic Cancer Metastatic Disease

P-106 Descriptive study of long-term survivors with advanced pancreatic cancer María Amor Urbano Poster Presentation Clinical Pancreatic Cancer Metastatic Disease

P-107 Dermatopathological review of cutaneous squamous cell carcinoma events in patients With gastrointestinal stromal tumors treated with ripretinib Anisha Patel Poster Presentation Others ( Including GIST and Anal Cancer ) Metastatic Disease Pathology

P-108 Circulating tumor DNA for early relapse detection and monitoring disease status in patients with early-stage pancreatic adenocarcinoma Maen Abdelrahim Poster Presentation Clinical Pancreatic Cancer Biomarkers and Translational Research Assigned ID Abstract Title Presenting Author First Presenting Author Accepted Presentation Category Sub-category Name Last Name Preference P-109 CYTOFLOC: Evaluation of a non-endoscopic immunocytological device (Cytosponge™) for post-chemo-radiotherapy surveillance in patients with oesophageal cancer Somnath Mukherjee Poster Presentation Clinical Esophageal Cancer Biomarkers and Translational Research – a feasibility study RadioTherapy

P-110 Is dexamethasone necessary as a prophylactic antiemetic prior to gemcitabine plus nab-paclitaxel therapy? Shiho Murata Poster Presentation Clinical Pancreatic Cancer Metastatic Disease

P-111 PERSPECTIVE: Tepotinib plus cetuximab in patients with RAS/BRAF wild-type left-sided metastatic colorectal cancer and acquired resistance to anti-EGFR antibody Josep Tabernero Poster Presentation Clinical Colon Cancer Metastatic Disease therapy due to MET amplification Trial in Progress

P-112 Compliance analysis of biological samples and questionnaire collection in a colorectal cancer microbiome study: the VHIO experience Stefania Napoli Poster Presentation Clinical Colon Cancer Others: Compliance analysis

P-113 FIGHT-302: Phase 3 study of first-line pemigatinib vs gemcitabine + cisplatin for cholangiocarcinoma with FGFR2 fusions or rearrangement Tanios Bekaii-Saab Poster Presentation Clinical Bilary Tract Cancer Trial in Progress

P-114 Claudin 18 isoform expression in gastric adenocarcinoma and pancreatic adenocarcinoma Takeshi Saito Poster Presentation Basic Gastric Cancer Biomarkers and Translational Research

P-115 A multicenter, open-label, randomized, phase 3 trial of infigratinib vs gemcitabine plus cisplatin in patients with advanced cholangiocarcinoma and FGFR2 gene Ivan Borbath Poster Presentation Clinical Bilary Tract Cancer Trial in Progress rearrangements (PROOF 301) P-116 What have we learned about of trifluridine/tipiracil (TAS-102)? Real World Data at four GEODA hospitals (Spain) Julia Martínez Pérez Poster Presentation Clinical Colon Cancer Metastatic Disease

P-117 Survival outcomes following systemic chemotherapy in stage IVA/B high-grade mucinous appendiceal cancer after unsuccessful cytoreductive surgery and Ekaterina Baron Poster Presentation Others ( Including GIST and Anal Cancer ) Metastatic Disease hyperthermic intraperitoneal chemotherapy Surgery

P-118 Survival outcomes of adjuvant chemotherapy in stage IVA/B high-grade appendiceal cancer treated with cytoreductive surgery and hyperthermic intraperitoneal Ekaterina Baron Poster Presentation Others ( Including GIST and Anal Cancer ) Metastatic Disease chemotherapy Surgery

P-119 Impact of circulating tumor DNA on clinical decisions in the adjuvant setting in patients with colorectal cancer Vanessa Wookey Poster Presentation Clinical Colon Cancer Biomarkers and Translational Research Early and Locally Advanced Disease

P-120 Pre-assessment tool predicting complication following oesophagogastric resection: Sarcopenia or incremental shuttle walk test Manjunath Siddaiah- Poster Presentation Clinical Esophageal Cancer Screening/Prevention/Epidemiology Subramanya P-121 Efficacy and toxicity of biosimilar and original bevacizumab in the second-line treatment of metastatic colon cancer in routine clinical practice: Results of an Mikhail Fedyanin Poster Presentation Clinical Colon Cancer Metastatic Disease observational multicenter study P-122 Gastrointestinal side effects of morphine in cancer pain: A comparison between the smoking and non-smoking patients Fatima Zahra Hijri Poster Presentation Others ( Including GIST and Anal Cancer ) Others: Clinical pharmacology

P-123 Survival analysis based on the grade of neutropenia in patients with metastatic colorectal cancer treated with trifluridine-tipiracil Victoria Aviñó Tarazona Poster Presentation Clinical Colon Cancer Metastatic Disease

P-124 Nivolumab plus ipilimumab as neoadjuvant therapy for potentially resectable hepatocellular carcinoma Yung-Yeh Su Poster Presentation Clinical Hepatocellular Carcinoma Early and Locally Advanced Disease

P-125 Caring for more than survival: A survey of patient preferences in advanced hepatocellular carcinoma Siu Hing Lo Poster Presentation Clinical Hepatocellular Carcinoma Others: Patient preferences

P-126 Atezolizumab plus bevacizumab for patients with advanced hepatocellular carcinoma and chronic B with high viral load Chiun Hsu Poster Presentation Clinical Hepatocellular Carcinoma Early and Locally Advanced Disease Metastatic Disease

P-127 Lymphocyte to monocyte ratio as a prognostic factor in stage IV pancreatic ductal adenocarcinoma naive patients before gemcitabine-nab-paclitaxel chemotherapy Andrea Pretta Poster Presentation Clinical Pancreatic Cancer Biomarkers and Translational Research Metastatic Disease

P-128 Influence of anti-diabetic medications on the outcomes of patients with pancreatic ductal adenocarcinoma and type 2 diabetes mellitus Andrea Pretta Poster Presentation Clinical Pancreatic Cancer Metastatic Disease

P-129 Concomitant RAS and BRAF mutations: impact on overall survival and progression free survival in metastatic colorectal cancer patients Andrea Pretta Poster Presentation Clinical Colon Cancer Metastatic Disease Pathology

P-130 Real-world outcomes of patients with colorectal liver metastases treated with transarterial radioembolization: Results from CIRT, a large European, prospective Niklaus Schaefer Poster Presentation Clinical Colon Cancer Metastatic Disease multi-centre, observational study P-131 External validation of prognostic ALAN score in patients with inoperable cancer treated with second-line chemotherapy Riccardo Giampieri Poster Presentation Clinical Bilary Tract Cancer Metastatic Disease

P-132 Molecular profiling of KIT and PDGFRA in Chilean GIST patients: A Latin-American perspective M. Muñoz-Medel Poster Presentation Others ( Including GIST and Anal Cancer ) Biomarkers and Translational Research Pathology

P-133 The watch-and-wait approach in stage IV rectal cancer patients: A good alternative for TME surgery? Petra Custers Poster Presentation Clinical Rectal Cancer Metastatic Disease Surgery

P-134 Social determinants of health are risk factors for early onset colorectal cancer in Appalachia William Oelsner Poster Presentation Clinical Colon Cancer Early and Locally Advanced Disease Screening/Prevention/Epidemiology

P-135 Pembrolizumab/quavonlimab coformulation in combination with lenvatinib in advanced hepatocellular carcinoma: Phase 2 trial in progress Daneng Li Poster Presentation Basic Hepatocellular Cancer Trial in Progress

P-136 Detecting panitumumab/FOLFOX responders in K-Ras wild-type metastatic colorectal cancer through an artificial intelligence-based analytical tool Carlos Galmarini Poster Presentation Clinical Colon Cancer Biomarkers and Translational Research

P-137 Patient baseline characteristics in the PROMETCO study: A real-world, prospective longitudinal cohort on the continuum of care of metastatic colorectal cancer Miriam Koopman Poster Presentation Clinical Colon Cancer Metastatic Disease

P-138 Margetuximab combined with anti-PD-1 (retifanlimab) or anti-PD-1/LAG-3 (tebotelimab) +/- chemotherapy in first-line therapy of advanced/metastatic HER2+ Daniel Catenacci Poster Presentation Clinical Gastric Cancer Trial in Progress gastroesophageal junction or gastric cancer P-139 A phase 2 multicohort study (LEAP-005) of lenvatinib plus pembrolizumab in patients with previously treated selected solid tumors: Pancreatic cancer cohort Hyun Cheol Chung Poster Presentation Basic Pancreatic Cancer Trial in Progress

P-140 A phase I study of biweekly abraxane in combination with oxaliplatin and oral S-1/leucovorin as first line treatment for advanced gastric, pancreatic and biliary tract Hui-Jen Tsai Poster Presentation Others ( Including GIST and Anal Cancer ) Metastatic Disease cancers Assigned ID Abstract Title Presenting Author First Presenting Author Accepted Presentation Category Sub-category Name Last Name Preference P-141 Neoadjuvant chemotherapy with docetaxel, nedaplatin, and 5-FU for resectable esophageal cancer: A single center retrospective study Satoko Shindo Poster Presentation Clinical Esophageal Cancer Early and Locally Advanced Disease Surgery

P-142 Safety and efficacy of apatinib for non-surgical advanced esophageal cancer: A real-world study Changqing Sun Poster Presentation Clinical Esophageal Cancer Trial in Progress

P-143 Polyphyllin Ⅱ and resiquimod-loaded injectable hydrogels promote the polarization of tumor-associated macrophages and enhance gastric cancer immunotherapy Yan Yang Poster Presentation Basic Gastric Cancer Preclinical

P-144 A comparative analysis of secondary data from the ToGA and EVIDENCE studies on the effectiveness of trastuzumab plus chemotherapy in Asian patients with Ying Wu Poster Presentation Clinical Gastric Cancer Others: Secondary data analysis HER2+ metastatic gastric cancer P-145 Doublet regimen plus anti-vascular endothelial growth factor drug regimen after progression to first-line FOLFOXIRI and bevacizumab in metastatic colorectal Toshihiko Matsumoto Poster Presentation Clinical Colon Cancer Metastatic Disease cancer P-146 Clinical usefulness of next generation sequencing by liquid for advanced gastric cancer Toshihiko Matsumoto Poster Presentation Clinical Gastric Cancer Biomarkers and Translational Research

P-147 Epigenetic gene somatic mutations in gastric cancer Alexey Kalinkin Poster Presentation Basic Gastric Cancer Biomarkers and Translational Research

P-148 Perfect concordance between blood-based and normal tissue-based dihydropyrimidine dehydrogenase polymorphisms suggests that pharmacogenetic screening Cristina Morelli Poster Presentation Clinical Colon Cancer Biomarkers and Translational Research could be contextual to tumour molecular profiling P-149 Integrative analysis of the genomic and transcriptomic landscape identifies novel key genes as a therapeutic target in bile duct cancer Massimiliano Salati Poster Presentation Basic Biliary Tract Cancer Biomarkers and Translational Research

P-150 Insights into the gastric and oesophageal cancer patient experience: Results of a pan-European patient survey Zorana Maravic Poster Presentation Clinical Gastric Cancer Others: Patient Survey Results - Real World Experience Data

P-151 The prognostic value of TCF1+CD8+T cell in primary small cell carcinoma of the Xiangjiao Meng Poster Presentation Basic Esophageal Cancer Biomarkers and Translational Research

P-152 Sarcopenia in advanced colorectal cancer patients treated with trifluridine/tipiracil Mateusz Malik Poster Presentation Clinical Colon Cancer Biomarkers and Translational Research Metastatic Disease

P-153 Safety and effectiveness of sorafenib in elderly patients diagnosed with advanced hepatocellular carcinoma in a monographic oncologic center Zara Vidales Sepulveda Poster Presentation Clinical Hepatocellular Carcinoma Metastatic Disease

P-154 A randomized phase 3 study evaluating the efficacy and safety of first-line pembrolizumab plus lenvatinib plus chemotherapy compared with chemotherapy in Josep Tabernero Poster Presentation Clinical Gastric Cancer Trial in Progress patients with advanced/metastatic gastroesophageal adenocarcinoma: LEAP-015 P-155 A phase I study of FLOT as first-line therapy for Japanese patients with advanced gastric cancer including patients with or without severe peritoneal metastasis Kazuhiro Shiraishi Poster Presentation Clinical Gastric Cancer Trial in Progress

P-156 A European chart review of treatment patterns and outcomes for patients with resected esophageal cancer or gastroesophageal junction cancer Prianka Singh Poster Presentation Clinical Esophageal Cancer Early and Locally Advanced Disease

P-157 Assessing fitness for systemic therapy in hepatocellular carcinoma: Evaluating time on treatment according to Child-Pugh classification, model for end-stage liver Benjamin Staum Poster Presentation Clinical Hepatocellular Carcinoma Metastatic Disease disease score, and AFP level P-158 Deciphering the immunological determinants of response to neoadjuvant chemo-radiation in esophageal adenocarcinoma Giuseppina Arbore Poster Presentation Basic Esophageal Cancer Biomarkers and Translational Research

P-159 HERIZON: Phase 2 part of the IMU-131 HER2/neu vaccine plus chemotherapy study randomized in patients with HER2/NEU overexpressing metastatic or advanced Rita Laeufle Poster Presentation Clinical Gastric Cancer Metastatic Disease adenocarcinoma of the stomach or gastroesophageal junction Trial in Progress

P-160 Young Latin American population with colorectal cancer: Characteristics of bad prognosis German Calderillo-Ruiz Poster Presentation Clinical Colon Cancer Metastatic Disease Screening/Prevention/Epidemiology

P-161 The diagnostic methods for detection of Helicobacter pylori infection: A comparative approach to invasive methods Fabian Castro-Valencia Poster Presentation Basic Gastric Cancer Screening/Prevention/Epidemiology

P-162 Universally adopted Vitamin D deficiency cutoff of 10 ng/mL is optimal for metastatic colorectal cancer prognostication and corrleated with neutrophil/lymphocyte Michela Rofei Poster Presentation Clinical Colon Cancer Biomarkers and Translational Research ratio Metastatic Disease

P-163 Real-world outcomes of cisplatin, capecitabine and gemcitabine with either epirubicin (PEXG) or docetaxel (PDXG) as first-line palliative treatment in metastatic or Nadia Hitchen Poster Presentation Clinical Pancreatic Cancer Metastatic Disease unresectable locally advanced pancreatic adenocarcinoma P-164 MONEO: A phase II study of avelumab plus FLOT in the peri-operative treatment for patients with resectable gastric or gastroesophageal junction cancer Maria Alsina Poster Presentation Clinical Gastric Cancer Trial in Progress

P-165 Comparative study on the clinical effect of hand-assisted laparoscopic and laparoscopic gastrectomy for gastric stromal tumor Qu-xia Zhang Poster Presentation Clinical Gastric Cancer Imaging Surgery

P-166 Operative versus nonoperative treatment for stage 0 rectal cancer following chemoradiation therapy Fátima Aurora Aires Poster Presentation Clinical Rectal Cancer RadioTherapy

P-167 Efficacy of PD-1 inhibitors for colorectal cancer and polyps in Lynch syndrome patients Binyi Xiao Poster Presentation Clinical Colon Cancer Biomarkers and Translational Research

P-168 Differences in coping strategies used by colorectal vs. non-colorectal cancer patients: Data from the Neoetic-SEOM study Vilma Pacheco-Barcia Poster Presentation Clinical Colon Cancer Others: Psychological impact

P-169 Tumor-infiltrating lymphocytes in colorectal cancer: A clinical outcome predictor Marina Vitorino Poster Presentation Clinical Colon Cancer Biomarkers and Translational Research

P-170 Assessment of long-term outcomes and predictive factors of in branch-duct intraductal papillary mucinous neoplasms: A retrospective study in a Anas Chennouf Poster Presentation Clinical Pancreatic Cancer Screening/Prevention/Epidemiology Canadian referral center Others: Malignancy risk

P-171 Does metastasectomy really improve survival in gastric cancer? Francisca Giselle Moura Poster Presentation Clinical Gastric Cancer Metastatic Disease Surgery

P-172 PTHrP and SPARC expressions in human colorectal cancer: An in silico analysis Pedro Carriere Poster Presentation Basic Colon Cancer Biomarkers and Translational Research Assigned ID Abstract Title Presenting Author First Presenting Author Accepted Presentation Category Sub-category Name Last Name Preference P-173 Customisation of therapeutic strategy in metastatic colorectal cancer by use of liquid : Final results of an observational study Myrto Kastrisiou Poster Presentation Clinical Colon Cancer Biomarkers and Translational Research Metastatic Disease

P-174 MOUNTAINEER-02: Phase 2/3 study of tucatinib, trastuzumab, ramucirumab, and paclitaxel in previously treated HER2+ gastric or gastroesophageal junction John Strickler Poster Presentation Clinical Gastric Cancer Metastatic Disease adenocarcinoma: Trial in progress Trial in Progress

P-175 Effectiveness, prognostic factors and safety concerning ablative techniques in liver metastases from gastrointestinal tumors Martin Igor Gomez-Randulfe Poster Presentation Clinical Colon Cancer Imaging Rodriguez Metastatic Disease

P-176 A multicenter, randomized phase 1b/2 study of gemcitabine and cisplatin with or without CPI-613 as first-line therapy for patients with advanced unresectable Vaibhav Sahai Poster Presentation Clinical Bilary Tract Cancer Trial in Progress biliary tract cancer (BilT-04) P-177 Early onset colorectal cancer outcomes in a public Uruguayan cancer centre Santiago Fontes Poster Presentation Clinical Colon Cancer Early and Locally Advanced Disease Screening/Prevention/Epidemiology

P-178 Rego-Nivo II-III: Proof-of-concept phase II trial for the treatment of HCC refractory to chimiotherapy after the 2nd line yasmina ben merabet Poster Presentation Clinical Hepatocellular Carcinoma Metastatic Disease

P-179 Complications of the rescue esophagectomy in advanced esophageal cancer José Luiz Braga de Aquino Poster Presentation Clinical Esophageal Cancer Surgery

P-180 Rectal cancer in the elderly: Characteristics, management and outcomes from a single centre retrospective cohort review Ruba Hamed Poster Presentation Clinical Rectal Cancer Early and Locally Advanced Disease

P-181 Exploratory randomized phase II trial for optimizing treatment dosage and duration of adjuvant S-1 plus oxaliplatin in patients with stage III colon cancer (SOAP Yusuke Suwa Poster Presentation Clinical Colon Cancer Early and Locally Advanced Disease trial) P-182 A multicenter study of prognostic factors in nivolumab monotherapy for advanced or recurrent esophageal cancer Tatsuki Ikoma Poster Presentation Clinical Esophageal Cancer Biomarkers and Translational Research Metastatic Disease

P-183 Laparoscopic colorectal resection for elderly patients aged 80 years or older: A propensity score analysis Ryo Inada Poster Presentation Clinical Colon Cancer Surgery

P-184 Underlining mechanism for the efficacy of tumor treating fields (TTFields) concomitant with sorafenib for treatment of hepatocellular carcinoma Sara Jacobovitch Poster Presentation Basic Hepatocellular Cancer Preclinical

P-185 A prospective, randomized, controlled, multicenter phase III clinical trial of apatinib combined with neoadjuvant chemoradiotherapy for patients with locally Qun Zhao Poster Presentation Clinical Gastric Cancer Early and Locally Advanced Disease advanced, HER2-negative, Siewert’s type II-III adenocarcinoma of esophagogastric junction P-186 -positive circulating tumor cells as diagnostic and prognostic biomarkers in biliary tract cancer patients Dong Uk Kim Poster Presentation Basic Biliary Tract Cancer Biomarkers and Translational Research

P-187 Watch-and-wait strategy for DNA mismatch repair-deficient/microsatellite instability-high rectal cancer with a clinical complete response after neoadjuvant Qiao-Xuan Wang Poster Presentation Clinical Rectal Cancer Early and Locally Advanced Disease immunotherapy: An observational cohort study P-188 Propensity score analysis of outcomes following laparoscopic or open radical resection for carcinoma in T2 and T3 stages Changwei Dou Poster Presentation Clinical Bilary Tract Cancer Surgery

P-189 Safety and feasibility of liposomal irinotecan for unresectable pancreatic adenocarcinoma: Real-world experience in a Japanese cohort Ayano Sakai Poster Presentation Clinical Pancreatic Cancer Metastatic Disease

P-190 Exploring possible predictors of survival in hepatocellular carcinoma Inês Eiriz Poster Presentation Clinical Hepatocellular Carcinoma Others: predictors of survival

P-191 Prognostic factors of colorectal cancer liver metastasectomy Inês Costa Poster Presentation Clinical Colon Cancer Metastatic Disease

P-192 Chemoradiation for carcinoma: A multicentric retrospective cohort study Inês Leão Poster Presentation Others ( Including GIST and Anal Cancer ) RadioTherapy Others: Chemotherapy

P-193 Final results of followed by adjuvant chemotherapy with 3-month capecitabine plus oxaliplatin for colorectal cancer liver metastases: A multicenter Hiroki Hashida Poster Presentation Clinical Colon Cancer Metastatic Disease phase 2 study P-194 Study of efficacy and safety of combination of octreotide acetate LAR with lenvatinib as second-line therapy in patients with advanced G1-G2 NETs of non- Varun Goel Poster Presentation Clinical Neuroendocrine Tumors Metastatic Disease pancreatic origin Others: treatment

P-195 Gastric adenocarcinoma classification: Association with clinicopathological features and overall survival in Moroccan patients Jean Paul Nshizirungu Poster Presentation Basic Gastric Cancer Biomarkers and Translational Research

P-196 Frequency, biological behaviour and survival nomograms discrimination in non-KIT mutated gastrointestinal stromal tumors Tiago Alpoim Poster Presentation Others ( Including GIST and Anal Cancer ) Biomarkers and Translational Research Screening/Prevention/Epidemiology

P-197 The influence of proton pump inhibitor utilization on the pathological response of rectal cancer: A multicenter study by the Sociedad Latino Americana de Marcelle Cesca Poster Presentation Clinical Rectal Cancer Early and Locally Advanced Disease Oncologia Gastrointestinal (SLAGO) Others: Drug-drug interactions

P-198 Prevalence of deleterious DPYD variants in patients with gastrointestinal malignancies: Real-world data from a single institution in Italy Claudia Cardone Poster Presentation Others ( Including GIST and Anal Cancer ) Biomarkers and Translational Research Others: pharmacology

P-199 Baseline neutrophil to lymphocyte ratio predicts survival in patients with metastatic colorectal cancer treated with cetuximab plus avelumab (CAVE) as a Davide Ciardiello Poster Presentation Clinical Colon Cancer Metastatic Disease rechallenge strategy P-200 A phase II study of dose reductive XELOX plus bevacizumab in elderly or vulnerable patients with metastatic colorectal cancer: MCSGO-1202 Ken Nakata Poster Presentation Clinical Colon Cancer Metastatic Disease

P-201 Retrospective evaluation of patients with colorectal cancer with metastasis in the central nervous system: Clinical and epidemiological prognostic factors Marcelle Cesca Poster Presentation Clinical Colon Cancer Metastatic Disease Screening/Prevention/Epidemiology

P-202 Primary tumour location and efficacy of first-line anti-EGFR agents in the treatment of RAS wild-type metastatic colorectal cancer Joana Marinho Poster Presentation Clinical Colon Cancer Metastatic Disease

P-203 Relationship of myelotoxicity and of gastrointestinal toxicity with the treatment outcome in trials of second-line chemotherapy of patients with metastatic Antonella Venturino Poster Presentation Clinical Colon Cancer Metastatic Disease colorectal cancer P-204 Survival improvement from the addition of biologics is not affected by performance status in patients with metastatic colorectal cancer: A meta-analysis Giuseppe Colloca Poster Presentation Clinical Colon Cancer Metastatic Disease Assigned ID Abstract Title Presenting Author First Presenting Author Accepted Presentation Category Sub-category Name Last Name Preference P-206 Survival comparison of first-line therapies in locally advanced or metastatic pancreatic cancer: A Portuguese oncology unit experience Rita Gameiro-dos- Poster Presentation Clinical Pancreatic Cancer Metastatic Disease Santos P-207 FLOT in clinical practice: Retrospective analysis of an oncological center Raquel Fontes Poster Presentation Clinical Gastric Cancer Early and Locally Advanced Disease

P-208 Pancreatic neuroendocrine neoplasia: Experience of a comprehensive cancer center Sara Coelho Poster Presentation Clinical Neuroendocrine Tumors Early and Locally Advanced Disease Metastatic Disease

P-209 Cancers of the bile duct: A study of 30 cases wassila benamar Poster Presentation Basic Biliary Tract Cancer Early and Locally Advanced Disease Metastatic Disease

P-210 Capecitabine and temozolomide for metastatic neuroendocrine neoplasms: A single-center “real-word” data analysis Ana Caetano Poster Presentation Clinical Neuroendocrine Tumors Metastatic Disease

P-211 Risk of diabetes in subjects with positive fecal immunochemical test: A nationwide population-based study Hyun Jung Lee Poster Presentation Clinical Colon Cancer Screening/Prevention/Epidemiology

P-212 The genetic and epigenetic abnormalities of plasma cfDNA as liquid biopsy biomarkers for diagnosis and prognosis stratification of pancreatic ductal Yuying Wang Poster Presentation Clinical Pancreatic Cancer Screening/Prevention/Epidemiology adenocarcinoma P-213 Helicobacter pylori babA gene evolution and adaptation in Colombian populations Kevin Guzman Poster Presentation Basic Gastric Cancer Biomarkers and Translational Research Pathology

P-214 Should patients with active gastrointestinal tumors receive thromboprophylaxis to avoid the negative clinical consequences of CAT? Sub-analysis of ACT4CAT study Nikolaos Tsoukalas Poster Presentation Others ( Including GIST and Anal Cancer ) Screening/Prevention/Epidemiology

P-215 Outcomes following surgery for resectable pancreatic neuroendocrine tumors: A Brazilian single institutional experience Dante Arra Poster Presentation Basic Neuroendocrine Tumors Preclinical Surgery

P-216 Gender-specific genomic alterations among Hispanic patients with metastatic colorectal cancer Alexander Philipovskiy Poster Presentation Clinical Colon Cancer Metastatic Disease

P-217 The knowledge and awareness for colorectal cancer in advanced colorectal cancer patients in : A national multicenter study Huifang Xu Poster Presentation Clinical Colon Cancer Screening/Prevention/Epidemiology

P-218 STAT3 signaling inhibition in regulatory T cells improves immune response to RT in PDAC Miles Piper Poster Presentation Basic Pancreatic Cancer Biomarkers and Translational Research RadioTherapy

P-219 Real-life experience with chemotherapy plus biologics in first-line treatment of right-sided, RAS wild-type, metastatic colon cancer: A multicenter Onco-Colon Çağatay Arslan Poster Presentation Clinical Colon Cancer Metastatic Disease Turkey study P-220 Linc01088 promotes the progression and tumor immune escape in colorectal cancer by sponging multiple microRNAs Chenmeng Li Poster Presentation Basic Colon Cancer Biomarkers and Translational Research

P-221 Repurposing disulfiram as treatment for metastatic colorectal cancer: An investigator-initiated clinical phase II trial Line Tarpgaard Poster Presentation Clinical Colon Cancer Metastatic Disease

P-222 Dihydropyrimidine dehydrogenase deficiencies and fluoropyrimidine toxicities: A study in the Tunisian Center Rihab Melliti Poster Presentation Clinical Colon Cancer Others: toxicity of chemotherapy

P-223 Gasdermin B predicts good prognosis and more macrophage infiltration liang Sun Poster Presentation Basic Colon Cancer Pathology

P-224 Expression of major components of the exosome biogenesis pathway is deregulated in colorectal cancer and associated with clinical outcome: Preliminary results Anastasia Kottorou Poster Presentation Basic Colon Cancer Biomarkers and Translational Research from an association study P-225 Clinico-epidemiological and therapeutic profile of rectal cancer: Experience of the department of radiation oncology EHSO ORAN Meriem Cheriguene Poster Presentation Clinical Rectal Cancer RadioTherapy

P-226 Trifluridin/tipiracil and regorafenib sequencing in Slovenian patients with metastatic colorectal cancer Tanja Mesti Poster Presentation Clinical Colon Cancer Metastatic Disease

P-227 Comparative safety and tolerability of approved PARP inhibitors in cancer: A systematic review and network meta-analysis Zhaolun Cai Poster Presentation Clinical Pancreatic Cancer Early and Locally Advanced Disease

P-228 Phase II multicentric randomized controlled trial to compare first-line treatment with FOLFOX6m + mAB alone or in combination with liver chemoembolization Anna Virgili Poster Presentation Clinical Colon Cancer Trial in Progress (Lifepearls-Irinotecan) in poor prognosis colorectal cancer with liver-limited disease P-229 Systematic review and pooled analysis of locoregional therapies in patients with intrahepatic cholangiocarcinoma Julien Edeline Poster Presentation Clinical Bilary Tract Cancer Early and Locally Advanced Disease

P-230 Is stereotactic of resectable colorectal liver metastasis an alternative for liver resection in the Covid-19 pandemic? Thiery Chapelle Poster Presentation Clinical Colon Cancer Surgery

P-231 Systemic inflammatory biomarkers and their association with survival in gastroesophageal cancer patients: A retrospective single-center analysis Hannah Christina Puhr Poster Presentation Clinical Gastric Cancer Biomarkers and Translational Research

P-232 Prognostic inflammatory and microRNA biomarkers in stage IV colorectal cancer patients Sally Temraz Poster Presentation Clinical Colon Cancer Biomarkers and Translational Research

P-233 Patient information and management by eHealth intervention during colon cancer Melina Campagnaro Poster Presentation Clinical Colon Cancer Others: Digital Support

P-234 Participation of screening and barriers in Chinese patients with advanced colorectal cancer before diagnosis: A national multi-center cross-sectional study Yin Liu Poster Presentation Clinical Colon Cancer Screening/Prevention/Epidemiology

P-235 E-health monitoring during pancreatic cancer treatment Melina Campagnaro Poster Presentation Clinical Pancreatic Cancer Others: Digital Monitoring

P-236 Determination of PD-L1 and MSI in ampullary carcinomas Elizaveta Eremeeva Poster Presentation Basic Biliary Tract Cancer Pathology

P-237 Clinical doctors’ attitudes towards colorectal cancer genetic testing: A national multi-center cross-sectional study Yin Liu Poster Presentation Clinical Colon Cancer Screening/Prevention/Epidemiology

P-238 Clinicopathological profile and prognostic factors impacting survival of periampullary carcinoma: A tertiary care centre experience Aditya Singla Poster Presentation Clinical Pancreatic Cancer Early and Locally Advanced Disease Pathology

P-239 Consensus molecular subtypes of morphological regions on colorectal tumors Vlad Popovici Poster Presentation Basic Colon Cancer Biomarkers and Translational Research Assigned ID Abstract Title Presenting Author First Presenting Author Accepted Presentation Category Sub-category Name Last Name Preference P-240 The diagnosis and treatment of advanced colorectal cancer in China: A national multi-center cross-sectional study Huifang Xu Poster Presentation Clinical Colon Cancer Screening/Prevention/Epidemiology

P-241 Metastatic lymph node ratio as an addition to the nodal evaluation of TNM staging: A new sight for prevention of stage migrations Mert Tanal Poster Presentation Clinical Gastric Cancer Surgery

P-242 Comprehensive assessment of systemic and local immunity and clinical indicators in patients with gastric cancer Gulnoz Khakimova Poster Presentation Clinical Gastric Cancer Biomarkers and Translational Research

P-243 A prospective study to assess the impact of colostomy on psychosocial aspects of quality of life in colorectal cancer patients Divya Khosla Poster Presentation Clinical Colon Cancer Others: Quality of life

P-244 Role of preoperative contrast-enhanced computed tomography in staging of gastric cancer in patients undergoing upfront surgery with curative intent Lalchhandami Colney Poster Presentation Clinical Gastric Cancer Imaging

P-245 Evaluation of colon-specific plasma nanovesicles as new markers of colorectal cancer Inga Nazarova Poster Presentation Basic Colon Cancer Biomarkers and Translational Research

P-246 Comparison of microbiome diversity in gastric cancer patients and in non-cancerous patients Eun Joo Bang Poster Presentation Clinical Gastric Cancer Early and Locally Advanced Disease

P-247 In vivo feasibility study of a robotic arm-assisted endoscopic submucosal dissection for early gastric cancer Sang Hyun Kim Poster Presentation Clinical Gastric Cancer Early and Locally Advanced Disease

P-248 Determination of the optimal electrical field for in the rat stomach during irreversible electroporation Geon Park Poster Presentation Basic Gastric Cancer Early and Locally Advanced Disease

P-249 Long-term oncologic safety of self-expandable metal stent as a bridge to surgery for obstructing colon cancer jeongyun shim Poster Presentation Clinical Colon Cancer Early and Locally Advanced Disease

P-250 Epidemiological, diagnostic and therapeutic profile of pancreatic cancer: Experience of a medical oncology department Somia Chaibdra Tani Poster Presentation Clinical Pancreatic Cancer Early and Locally Advanced Disease Metastatic Disease

P-251 Multidisciplinary challenge for the oncologist and surgeon: Gastrointestinal stromal tumors. Follow-up of a tertiary surgical department Elif Baran Poster Presentation Others ( Including GIST and Anal Cancer ) Surgery

P-252 Residual fibrosis after treatment with anti-epidermal growth factor receptor or bevacizumab in colorectal liver metastases and its correlation with survival: A Xavier Hernández-Yagüe Poster Presentation Clinical Colon Cancer Metastatic Disease retrospective pooled analysis Pathology

P-253 Detection of potential molecules that might be implicated in colorectal metastasis to lung Panagiotis Apostolou Poster Presentation Basic Colon Cancer Biomarkers and Translational Research

P-254 Role of neutrophil-lymphocyte ratio in the prognosis of stomach carcinoma undergoing curative resection Sachin Ambre Poster Presentation Clinical Gastric Cancer Surgery Others: Immunological markers

P-255 The clinical significance of the gut microbiota in RAS wild-type metastatic colorectal cancer patients treated with anti-EGFR monoclonal antibodies in combination Tomasz Lewandowski Poster Presentation Clinical Colon Cancer Metastatic Disease with chemotherapy - preliminary results P-256 Fibroblast-induced paradoxical PI3K pathway activation in colorectal cancer: Role of PTEN and potential implications for PI3K/mTOR inhibition Chiara Bazzichetto Poster Presentation Basic Colon Cancer Preclinical

P-258 Clinical study of PD-1 disrupted anti-MUC1 CAR-T cells in patients with advanced oesophageal cancer Size Chen Poster Presentation Clinical Esophageal Cancer Trial in Progress

P-259 Bone scan in gastrointestinal cancer CHERIFA GHOMARI Poster Presentation Basic Colon Cancer Imaging Metastatic Disease

P-260 Plasma exRNA-based identification of novel biomarkers in early gastric cancer Shaozhen Xing Poster Presentation Basic Gastric Cancer Biomarkers and Translational Research

P-261 Phase I study of multiple kinase inhibitor, TT-00420, in advanced, refractory cholangiocarcinoma Sarina Piha-Paul Poster Presentation Clinical Bilary Tract Cancer Biomarkers and Translational Research

P-262 Staining plasma with lipophilic dye followed by size-exclusion chromatography, immune-capturing and on-bead flow cytometry is a highly sensitive approach to Nadezhda Nikiforova Poster Presentation Basic Colon Cancer Biomarkers and Translational Research quantifying colorectal cancer derived extracellular nanovesicles Others: cancer diagnosis / liquid biopsy

P-263 The effects of co-administration of erlotinib and apatinib in the treatment oesophageal squamous cell carcinoma Yiguang Lin Poster Presentation Basic Esophageal Cancer Preclinical

P-264 Helicobacter pylori SNPs associated with tetracycline, clarithromycin and amoxicillin resistance in Colombia Kevin Guzman Poster Presentation Basic Gastric Cancer Biomarkers and Translational Research Pathology

P-265 Neoadjuvant radiotherapy for locally advanced rectal cancer during the first wave of COVID19 pandemic: Guy’s cancer cohort experience Kasia Owczarczyk Poster Presentation Clinical Rectal Cancer Early and Locally Advanced Disease RadioTherapy

P-266 Oncological outcomes of self-expanding metal stent as a bridge to surgery for obstructive left-sided colon cancer Laura Gomez Fernandez Poster Presentation Clinical Colon Cancer Surgery

P-267 -8 levels as a predictor of colorectal cancer patient prognosis Fabiana Conciatori Poster Presentation Basic Colon Cancer Biomarkers and Translational Research

P-268 Seaweed laminaria japonica peptides possess strong anti- effects Hongjie Chen Poster Presentation Basic Hepatocellular Cancer Preclinical

P-269 Advanced gastric cancer bleeding: Association of hemostatic radiotherapy and iron supplementation - Is there a survival benefit? André Laranja Poster Presentation Clinical Gastric Cancer RadioTherapy

P-270 Impact of intestinal stoma on quality of life in Tunisian patients with colorectal cancer Nouha Ammar Poster Presentation Clinical Colon Cancer Others: Quality of life

P-271 The anti-tumor effect of Curcuma phaeocaulis cyclopeptide in human hepatoma HepG2 cells Hongjie Chen Poster Presentation Basic Hepatocellular Cancer Preclinical

P-272 Significance of adding oxaliplatin to postoperative adjuvant chemotherapy in elderly patients with colorectal cancer Yusuke Nagata Poster Presentation Clinical Colon Cancer Early and Locally Advanced Disease

P-273 Mucinous colorectal cancer in Tunisian patients: A controversial clinicopathological type Hayfa Guettiti Tounsi Poster Presentation Basic Colon Cancer Pathology Assigned ID Abstract Title Presenting Author First Presenting Author Accepted Presentation Category Sub-category Name Last Name Preference P-274 Exploratory analysis of potential clinical, molecular and analytical prognostic factors of real-world patients with gastrointestinal stromal tumors: A single center Ignacio Perez Criado Poster Presentation Others ( Including GIST and Anal Cancer ) Biomarkers and Translational Research study Early and Locally Advanced Disease

P-275 Evaluation of radical chemoradiation outcomes in stage II/III anal cancer: Real-world data population Isabel Fernandes Poster Presentation Others ( Including GIST and Anal Cancer ) Early and Locally Advanced Disease

P-276 Sex and regorafenib toxicity in refractory colorectal cancer: A safety analysis of the RegARd-C trial Caroline Vandeputte Poster Presentation Clinical Colon Cancer Biomarkers and Translational Research

P-277 Development of an immune-related gene prognostic index for esophageal squamous cell carcinoma Qinghua Ji Poster Presentation Basic Esophageal Cancer Biomarkers and Translational Research

P-278 Checkpoint inhibitors in patients with advanced, refractory biliary tract cancers Savannah Liddell Poster Presentation Clinical Bilary Tract Cancer Metastatic Disease

P-279 Thromboembolic complications in colorectal cancers Nassima Mkedder Poster Presentation Basic Colon Cancer Screening/Prevention/Epidemiology

P-280 HEPANOVA: Final efficacy and safety results from a phase 2 study of Tumor Treating Fields (TTFields, 150 kHz) concomitant with sorafenib in advanced Anca Ligia Grosu Poster Presentation Clinical Hepatocellular Carcinoma Trial in Progress hepatocellular carcinoma P-281 Low proliferation indexes in colorectal cancer in Tunisian patients: Association with rectal localization, mucinous histological type and stage Dorra Wider Poster Presentation Basic Colon Cancer Biomarkers and Translational Research Pathology

P-282 Factors predicting response to neoadjuvant chemotherapy in gastric cancer Pavan Kumar CG Poster Presentation Clinical Gastric Cancer Early and Locally Advanced Disease Pathology

P-283 Prognostic factors in the evaluation of stage II/III squamous cell carcinoma of the anus treated with chemoradiation João Gramaça Poster Presentation Others ( Including GIST and Anal Cancer ) Early and Locally Advanced Disease

P-284 Exploratory magnetic resonance imaging histogram biomarkers for response prediction to neoadjuvant treatment in oesophageal/gastro-oesophageal cancer Kasia Owczarczyk Poster Presentation Clinical Esophageal Cancer Biomarkers and Translational Research Imaging

P-285 Treatment outcomes with sorafenib in advanced hepatocellular carcinoma: A single-center retrospective study Juraj Prejac Poster Presentation Clinical Hepatocellular Carcinoma Metastatic Disease

P-286 Assessment of the quality of life of patients with colorectal cancer in the Tunisian Center: A report of 142 patients Imtinene Belaid Poster Presentation Clinical Colon Cancer Early and Locally Advanced Disease Metastatic Disease

P-287 Preclinical evaluation of alpelisib (PI3K inhibitor ) and its synergistic effect in combination with ribociclib (CDK 4/6 inhibitor) in colorectal cancer Razia Aslam Poster Presentation Basic Colon Cancer Preclinical

P-288 Individual drug-screening and heterogeneity analyses of patient-derived tumoroids: A roadmap to improving therapy in pancreatic cancer Christine Nitschke Poster Presentation Basic Pancreatic Cancer Biomarkers and Translational Research

P-289 Gastric and esophageal signet ring cell adenocarcinoma: A retrospective analysis of outcomes at Mayo Clinic Yael Kusne Poster Presentation Clinical Esophageal Cancer Early and Locally Advanced Disease Pathology

P-290 Mutant allele specific imbalance in RAS as prognostic marker in colorectal cancer Yuval Kirshenboim Poster Presentation Clinical Colon Cancer Biomarkers and Translational Research

P-291 The prognostic and predictive factors for patients with locally advanced rectal cancer treated with neoadjuvant chemoradiotherapy Banu Ozturk Poster Presentation Clinical Rectal Cancer Early and Locally Advanced Disease Pathology

P-292 Tumor downstaging as an associated factor with recurrence of disease in patients with operated rectal cancer after neoadjuvant chemoradiotherapy: Real-world Rodrigo Motta Poster Presentation Clinical Rectal Cancer Biomarkers and Translational Research data from Peru Early and Locally Advanced Disease

P-293 Implementation of Medic Assistant: Solutions in a digital cloud supporting medical staff in their daily work with oncological patients during the SARS-COV2 Magdalena Kędzierska Poster Presentation Others ( Including GIST and Anal Cancer ) Others: Digital Medicine/Varia pandemic P-294 Impact of surgical margin status on the survival outcome after surgical resection of gastric cancer: A systematic review and meta-analysis Zhiyuan Jiang Poster Presentation Clinical Gastric Cancer Pathology Surgery

P-295 The importance of sphingosine kinase 1 isoform expression in the gut-liver axis Hongjie Chen Poster Presentation Basic Hepatocellular Cancer Biomarkers and Translational Research

P-296 Establishment of adoptive cell therapy with tumor-infiltrating lymphocytes for liver and oesophageal cancer Shuzhi Ma Poster Presentation Basic Hepatocellular Cancer Preclinical

P-297 Upfront dihydropyrimidine dehydrogenase deficiency detection to secure 5-FU or capecitabine administration: Application to colorectal cancer patients Nassima Mkedder Poster Presentation Clinical Colon Cancer Biomarkers and Translational Research