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original article Could semiquantitative analysis of real-time ultrasound elastography distinguish more liver parenchyma alterations of nonalcoholic fatty liver disease in patients with polycystic ovary syndrome? Na Di1,2, Xinchuan Zhou1, Yaxiao Chen2, Xiaomiao Zhao2, Lin Li2, Linlin Jiang2, Baoming Luo1, Xiaoli Chen2, Dongzi Yang2 ABSTRACT 1 Department of Ultrasound, Sun Objective: Nonalcoholic fatty liver disease is the commonest diffuse liver disease, of which women Yat-sen Memorial Hospital with polycystic ovary syndrome are at an increased risk. The aim of the present study was to assess of Sun Yat-sen University, the diagnostic value of the semiquantitative strain parameters of real-time ultrasound elastography for Guangzhou, China 2 Department of Obstetrics nonalcoholic fatty liver disease in patients with polycystic ovary syndrome. Subjects and methods: and Gynecology, Sun Yat-sen Thirty-five polycystic ovary syndrome patients with nonalcoholic fatty liver disease, 70 polycystic ovary Memorial Hospital of Sun Yat-sen syndrome patients without nonalcoholic fatty liver disease, and 70 healthy female controls of reproductive University, Guangzhou, China age were included. All participants underwent ultrasonic examination and semiquantitative analysis of real-time ultrasound elastography of the liver. Results: Main semi quantitative strain parameters, Correspondence to: Dongzi Yang such as average strain value, differed significantly among groups polycystic ovary syndrome with Department of Obstetrics and nonalcoholic fatty liver disease, polycystic ovary syndrome without nonalcoholic fatty liver disease, Gynecology, and control (87.02 ± 10.16 vs. 96.31 ± 11.44 vs. 104.49 ± 7.28, p < 0.001). Clinical and laboratory parameters Sun Yat-sen Memorial Hospital of Sun Yat-sen University differed significantly between the two subgroups with low or high average strain value. For diagnostic West Yanjiang Road 107, value of average strain value for elevated aminotransferase, the area under the curve was 0.808 (range Guangzhou, China 0.721-0.895). In multiple linear regression analysis, polycystic ovary syndrome, waist circumference, and [email protected] metabolic syndrome were stand-alone independent factors associated with average strain value among Received on Oct/24/2018 subjects without nonalcoholic fatty liver disease. Conclusion: Semiquantitative real-time ultrasound Accepted on Dec/12/2018 elastography analysis could distinguish liver parenchyma alterations in patients with polycystic ovary DOI: 10.20945/2359-3997000000119 syndrome more sensitively. The diagnostic value of the proposed method for nonalcoholic fatty liver disease need further research. Arch Endocrinol Metab. 2019;63(2):128-36 Keywords Polycystic ovary syndrome; nonalcoholic fatty liver disease; real-time ultrasound elastography; semiquantitative analysis; metabolic disturbances INTRODUCTION report (2). NAFLD is also used as a marker of severe onalcoholic fatty liver disease (NAFLD) is the metabolic disorders. N commonest diffuse liver disease, comprising the Polycystic ovary syndrome (PCOS) is the most spectrum of liver damage from simple hepatic steatosis common endocrine disorder among women of to nonalcoholic steatohepatitis to advanced fibrosis reproductive age, and the prevalence varies from 5% and cirrhosis, in patients without significant alcohol to 20% (1,3). It is also a metabolic disease according consumption and any other cause of liver diseases. The to high prevalence of the accompanying metabolic worldwide prevalence of NAFLD, which is 5%-58% in disturbances, which may pose a high long-term risk the general population, has increased over time and of cardiovascular diseases for patients with PCOS (4). has become a major public health problem (1). In the Women with PCOS are at an increased risk of NAFLD AE&M all rights reserved. © Chinese population from Hong Kong, the prevalence as reported previously: the prevalence of NAFLD varies Copyright of NAFLD is as high as 42% according to a 2015 from 23.8% to 86.79% among women with PCOS 128 Arch Endocrinol Metab. 2019;63/2 Real-time ultrasound elastography for nonalcoholic fatty liver disease in PCOS patients (5,6). Accordingly, it has been suggested that women USA). We recruited more than 5 participants for each with PCOS should be screened for liver disease more group. A total of 35 PCOS patients with NAFLD, 70 actively (7). PCOS patients without NAFLD, and 70 healthy female Although a liver biopsy is still considered the controls aged 20 to 40 years were recruited in our gold standard for detection of a liver disease such as Hospital from May 27, 2015, to November 31, 2015. fibrosis, this procedure is invasive and is associated with possible problems such as bleeding and severe Patients and controls pain, sampling errors, and interobserver variability (8). The study was approved by the Institutional Review Computed tomography (CT) or magnetic resonance Board of our Hospital. All participants provided written imaging (MRI) can quantify liver fat, but CT involves informed consent. The Chinese Clinical Trial Registry ionizing radiation, and both methods are costly (9). (http://www.chictr.org/en/) number is ChiCTR- Conventional ultrasonography has been used for OOC-15006452. Detailed data on all participates were detection of NAFLD in daily practice, but its accuracy is deposited in the Research Electronic Data Capture limited by subcutaneous fat thickness of patients and the (REDCap) databases. operator’s experience. Furthermore, it cannot provide PCOS was diagnosed according to the Rotterdam information about mechanical properties of the tissue. 2003 criteria (19), two of the following three criteria It is impractical to use these methods for assessment and had to be met: 1) oligomenorrhea and/or anovulation, frequent monitoring of NAFLD in PCOS patients of 2) clinical and/or biochemical hyperandrogenism, reproductive age. Real-time tissue elastography (RTE), 3) polycystic ovaries (PCO) (presence in each ovary of one of the ultrasound elastography technologies, has 12 or more follicles measuring 2 to 9 mm in diameter been rapidly evolving in the last decade, being used for and/or increased ovarian volume: more than 10 mL). diagnosis of focal lesions in various organs. According NAFLD was diagnosed according to conventional to recent reports, RTE is also useful for assessment of criteria (conventional ultrasonography) (20). Controls were defined as healthy non pregnant, amenorrheic fibrosis in patients with chronic liver diseases (10,11). women without endocrine disorders, PCO, and With the improvements in RTE, semiquantitative NAFLD. analysis of strain was developed. Parameters including Women were excluded from the study if they had a the average strain value (MEAN) of RTE are reported medical history that included other known liver diseases, to be useful for early diagnosis and staging of liver ovarian surgery, a malignant tumor, tobacco smoking, fibrosis (12-18). and alcohol drinking, other endocrine diseases, or a On the other hand, application of RTE with severe cardiocerebrovascular disease or if they were semiquantitative parameters to NAFLD is rarely taking medication that may affect metabolism, blood reported, never in PCOS women of reproductive age. pressure, or liver function during the last 3 months. The aims of our study were to analyze semiquantitative strain parameters of RTE of the liver in PCOS patients Bioclinical tests with or without NAFLD as compared to healthy The medical history including menstrual regularity, controls and then to evaluate the diagnostic value of medications, and past diseases was recorded. All these parameters for NAFLD in patients with PCOS. anthropometric data were measured and recorded including waist circumference (WC), hip circumference SUBJECTS AND METHODS (HC), waistline/hipline ratio (WHR), body mass index (BMI), acne score, modified Ferriman-Gallwey score Sample size estimate (mFG) for body hair evaluation, systolic blood pressure No previous study had reported the efficacy of RTE in (SBP), and diastolic blood pressure (DBP). diagnose of NAFLD in patients with PCOS. According Basal follicle-stimulating hormone (FSH), to report about RTE for assessment of liver fibrosis luteinizing hormone (LH), prolactin (PRL), in chronic hepatitis B (18), a sample size of 5 in each estradiol (E2), and total testosterone (TT) were group has a power of 0.949 at 5% significance to detect quantified by chemiluminesce Immunoassay on an AE&M all rights reserved. a difference of 6.39 in the value of MEAN between automatic biochemistry analyzer (DXI800, Beckman © cases and controls calculated by PASS 11(NCSS LLC, COULTER, Inc. USA) during the early follicular Copyright Arch Endocrinol Metab. 2019;63/2 129 Real-time ultrasound elastography for nonalcoholic fatty liver disease in PCOS patients phase or first 3 days of progestin withdrawal bleeding. RTE was performed as reported previously (16). Anti-Müllerian hormone (AMH) and sex hormone- The region of interest window was set to 1 cm under binding globulin (SHBG) were analyzed by an the Glisson’s capsule in the right lobe, avoiding enzyme-linked immunosorbent assay (ELISA) on a bile ducts and bile cysts. The pressure causing liver ELx808 plate reader (Biotek Instruments, Inc. USA). tissue strain came from subjects’ own heartbeat. The Serum transaminases, plasma glucose, insulin, and lipid RTE software (EZU-TESH1, Hitachi) was used to parameters were measured using standard methods on generate histograms. Three effective