Updates in Uterine and Vulvar Cancer

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Updates in Uterine and Vulvar Cancer Management of GYN Malignancies Junzo Chino MD Duke Cancer Center ASTRO Refresher 2015 Disclosures • None Learning Objectives • Review the diagnosis, workup, and management of: – Cervical Cancers – Uterine Cancers – Vulvar Cancers Cervical Cancer Cervical Cancer • 3rd most common malignancy in the World • 2nd most common malignancy in women • The Leading cause of cancer deaths in women for the developing world • In the US however… – 12th most common malignancy in women – Underserved populations disproportionately affected > 6 million lives saved by the Pap Test “Diagnosis of Uterine Cancer by the Vaginal Smear” Published Pap Test • Start screening within 3 years of onset of sexual activity, or at age 21 • Annual testing till age 30 • If no history of abnormal paps, risk factors, reduce screening to Q2-3 years. • Stop at 65-70 years • 5-7% of all pap tests are abnormal – Majority are ASCUS Pap-test Interpretation • ASCUS or LSIL –> reflex HPV -> If HPV + then Colposcopy, If – Repeat in 1 year • HSIL -> Colposcopy • Cannot diagnose cancer on Pap test alone CIN • CIN 1 – low grade dysplasia confined to the basal 1/3 of epithelium – HPV negative: repeat cytology at 12 months – HPV positive: Colposcopy • CIN 2-3 – 2/3 or greater of the epithelial thickness – Cold Knife Cone or LEEP • CIS – full thickness involvement. – Cold Knife Cone or LEEP Epidemiology • 12,900 women expected to be diagnosed in 2015 – 4,100 deaths due to disease • Median Age at diagnosis 48 years Cancer Statistics, ACS 2015 Risk Factors: Cervical Cancer • Early onset sexual activity • Multiple sexual partners • Hx of STDs • Multiple pregnancy • Immune suppression (s/p transplant, HIV) • Tobacco HPV • The human papilloma virus is a double stranded DNA virus • The most common oncogenic strains are 16, 18, 31, 33 and 45. • 16 and 18 account for 70% of US cases, with slightly less prevalence worldwide. HPV: oncogenesis • E6 binds to p53, inhibiting apoptosis and encouraging immortality • E7 binds to Rb, thus activating the cell cycle and promoting uncontrolled proliferation Yim & Park, Cancer Res Treat 2005 HPV: prevalence • ~50% of women will be exposed to HPV within 4 years of the onset of sexual activity • 2 year clearance rate of HPV is 90% with only 5% developing any cytological abnormality Schiffman et al, Lancet 2007 Vaccine • Cervarix: HPV 16, 18 • Gardasil: HPV 6, 11, 16, 18 – Most common in US • Gardasil 9 just approved (6, 11, 16, 18, 31, 33, 45, 52, 58) • All approved by FDA • All are a series of 3 injections over 6 months • Neither prevent or speed clearance of an existing HPV infection Quadrivalent Vaccine Efficacy Time until the Development of High-Grade Time until the Development of High-Grade Cervical Disease Associated with HPV-16, HPV-18 Cervical Disease Associated with any HPV The Future II study Group. NEJM 2007;356:1915 HPV vaccination rates ~32% Jemal A., et al. J Natl Cancer Inst. 2013 Feb 6;105(3):175-201 FIGO (2009) • Stage I – confined to the Uterus – IA1: 3mm or less stromal invasion, 7mm or less horizontal spread – IA2: >3mm to 5mm invasion, 7mm or less horizontal spread – IB1: 4.0 cm or less – IB2: >4cm • Stage II – local extension – IIA1: involves upper 2/3 of vagina, 4cm or less – IIA2: involves upper 2/3 of vagina, >4cm in size – IIB: parametrial involvement • Stage III – regional extension – IIIA: involves lower 1/3 of vagina – IIIB: extends to pelvic side wall or hydronephrosis seen on imaging • Stage IVA: invades bladder, rectum, or extends beyond true pelvis • Stage IVB: distant mets AJCC • T stage Mirrors FIGO, however adds N category • N1 = regional nodes (AJCC IIIB) • M1 = distant mets, and paraaortic nodes (AJCC IVB) Imaging • The only imaging allowed to affect FIGO stage is IVP (CT can be used to look for hydro) • MRI is the most accurate for determining local extent (~90% accurate for parametrial/vaginal involvement) • PET is the most accurate for nodal staging (sensitivity ~85%, specificity ~95%) Histology • >90% squamous cell • 7 - 10% adenocarcinoma • 1 - 2 % clear cell, small cell Para-Aortic Nodes Para-Aortic Common Iliac Nodes Dissection usually only extends to Presacral Nodes the IMA Internal Iliac Nodes External Iliac Nodes Obturator Nodes Risk of Pelvic LN Risk of nodes with <4mm invasion (stage IA1) is <5%, therefore nodal dissection or elective RT is not necessary Size Stage Ib Stage IIa <1 cm 18% 27% 2 - 3 cm 22% 18% 4 - 5 cm 35% 43% >6 cm 50% 38% Piver, et al. Obstet Gynecol. 1975 Nov;46(5):507-10. Lymph Node Distributions • Stage IB - IIA Cervix Benedetti-Panici, et al. Gynecol Oncol 1996;62:19–24 Lymph Node Distribution • Locally Advanced Cervix Benedetti-Panici, et al. Gynecol Oncol 1996;62:19–24 Locating the Obturator Nodes Find Obturator Groove (containing obturator nerve and vessels) Locating the Obturator Nodes Follow vessels superiorly until they enter the pelvis Para-aortic Lymph Node Involvement Stage IB Stage IIA Stage IIB Stage IIIA Stage IIIB Stage IV Lagasse 6% 18% 33% 0% 31% 25% (GOG, 1980) 8/143 4/22 19/58 0/3 19/61 1/4 Nelson — — 16% — 46% — (1977) 5/31 13/28 Piver — — 13% — 37% 57% (1981) 6/46 18/49 4/7 Wharton 0% 0% 21% — 33% (1977) 0/21 (0) 0/10 10/47 14/42 Risk of PA Nodes also increases with ~5% per pelvic node involved, though with 4+ nodes the risk is >40% Sakuragi et al, Cancer, 1999 Treatment Overview FIGO Treatment IA1 Cervical conization or extrafascial hysterectomy Consider vaginal radical trachelectomy for fertility sparing IA2 Modified radical hysterectomy & PLND IB1 IB2 MRH & PLND only in well selected Pts otherwise CTRT + Brachy IIA1 IIA2 Definitive chemoradiation IIB (EBRT + weekly cisplatin IIIA brachytherapy boost) IIIB IVA IVB Chemotherapy +/- palliative radiotherapy Modified Radical Hysterectomy Randomized Data: Early Stage Disease Surgery vs RT Milan trial: Radical surgery vs. XRT n = 337 R Radical hysterectomy + PLND (PA LN FIGO Ib-IIa cervical A sampling if suspicious) cancer • 50.4 Gy adjuvant XRT if > pT2a, cut- N through, +LN, <3 mm uninvolved D cervical stroma Years: 1986-1991 O 54% in Surgery arm received RT M Definitive radiation I • WPRT (median dose 47 Gy) • 45 Gy to PA nodes if +LN Z • 5-10 Gy boost to +LN E • LDR brachy (median cumulative point A dose 76 Gy) • Primary outcome: 5-yr OS and complication rate • Median f/u: 87 months Landoni, et al. Lancet 1997; 350:535 No difference in OS or DFS G2-3 toxcity worse with RH (28% vs 12%, SS) Edema 9% if RH + PORT % surviving % surviving Time since treatment (mo) Time since treatment (mo) Take Home – Outcomes the same but toxicity worse with RH in bulkier early stage disease Landoni et al, Lancet 1997 Randomized Data: Early Stage Disease Post-hysterectomy RT vs NFT RT vs CTRT GOG 92: Postop XRT for Stage IB, intermediate risk n = 277 R FIGO IB cervical ca No further tx s/p rad hys & PLND A with risk factors N Intermediate Risk (see inset) D O M Years: 1988-1995 I Z WPRT (46 Gy/23 fx or 50.8 Gy/28 fx) Exclusion criteria: • +LN E • Primary outcome: Recurrence risk/recurrence-free interval • Secondary outcomes: OS Sedlis et al, Gyn Onc 1999 • Median f/u: 5 years for surviving patients Rotman, et al. IJROBP 2006 May 1;65(1):169-76 Not powered for Survival GOG 109, SWOG 8797, RTOG 9112: Postop RT vs. RT+CDDP/5-FU for high-risk n = 243 R FIGO IA2 – IIA high- WPRT risk cervical cancer A • 49.3 Gy/29 fractions (EBRT) s/p hys & PLND N • 45 Gy to PA field (1.5 Gy/fx) if high • +LN &/or common iliac LN+ • +margin &/or D • +parametria O M I Years: 1991-1996 WPRT + CDDP/5-FU (4 cycles) Z • Bolus CDDP (70 mg/m2) & 5-FU E (4000 mg/m2 in 4 days) Q3 weeks • Cycles 1 & 2 with XRT • Primary outcomes: PFS, OS • Secondary outcomes: Toxicity • Median f/u: 3.5 years Peters et al, JCO 2000 Improved PFS with XRT+CDDP/5-FU PFS: 80% with chemoXRT vs. 63% with XRT Adjusted HR 2.01 (p = 0.003) free survival free - Progression Peters et al, JCO 2000 Improved OS with XRT+CDDP/5-FU OS: 81% with chemoXRT vs. 71% with XRT Adjusted HR 1.96 (p = 0.007) Overall survival Overall Peters et al, JCO 2000 Adjuvant RT conclusions • Women with large tumors, deep invasion, and/or LVSI should be considered for adjuvant RT. • Women with positive margins, nodes or parametrium should be offered radiation with chemo. Ongoing trials • Intermediate risk – GOG 263: RT vs CTRT • High risk – RTOG 0724: CTRT +/- adjuvant chemotherapy (4 cycles carbo/paclitaxel) • TIME-C/RTOG 1203 – 3D vs IMRT for postoperative cervix/uterine Advanced Disease Definitive CTRT and Brachytherapy RTOG 90-01: WPRT/Chemo vs. Pelvic/PA XRT n = 389 R FIGO IIB-IVA 45 Gy to pelvis and para-aortic LN cervical cancer or A (EFRT) LDR brachy IB-IIA cervical N cancer if tumor > 5 cm or +LN D O Cumulative point A dose > 85 Gy Years: 1990-1997 M Exclusion criteria: • Pos. PA LN I 45 Gy to pelvis with concurrent • Disease outside Z CDDP/5-FU LDR brachy pelvis • 3 cycles chemo (Q3 weeks) • Prior tx for E • 75 mg/m2 cisplatin cervical ca • 4000 mg/m2 5-FU over 4 days • Primary outcome: OS • Secondary outcomes: DFS, LR, PA node recurrence, distant metastases • Median f/u: 43 months (NEJM 1999); 79 months for surviving patients (JCO 2004) Morris et al, NEJM 1999 and Eifel et al, JCO 2004 Toxicity • Acute toxicity worse with CTRT – 11% G4-5 toxicity with CTRT vs 1% RT – Difference was largely due to Heme toxicity • Late toxicity no different – 14% in both arms Improved DFS with ChemoXRT 67% 40% LR recurrence: 19% with chemoXRT vs.
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