Liver Stiffness And Steatosis Assessment In Women With Polycystic Ovary Syndrome Using Fibroscan

Overview

Polycystic Ovary Syndrome (PCOS) is a complex endocrine and metabolic disorder prevalent among women of reproductive age. It is closely associated with insulin resistance, obesity, and metabolic dysfunction, often leading to hepatic steatosis (fatty liver). This single-center, cross-sectional, case-control study evaluates liver function in PCOS patients using FibroScan, a non-invasive elastography technique. Eighteen women diagnosed with PCOS according to Rotterdam criteria and 18 age- and BMI-matched healthy controls aged 18-45 years were included. The study aims to determine whether PCOS independently affects hepatic steatosis and to assess the clinical applicability of FibroScan in this population. The results may inform early metabolic risk detection and improve multidisciplinary management strategies for PCOS.

This prospective, cross-sectional study was conducted at Bezmialem Vakif University Hospital. The study included 36 women between the ages of 18 and 45. Eighteen participants were diagnosed with Polycystic Ovary Syndrome (PCOS) according to the Rotterdam 2003 criteria, which require at least two of the following features: oligo- or anovulation, clinical or biochemical hyperandrogenism, or polycystic ovarian morphology, with other endocrine disorders excluded. The remaining 18 participants, matched for age and body mass index (BMI), constituted the healthy control group. All evaluations were conducted according to a standardized protocol approved by the university ethics committee. Each participant underwent physical examination and anthropometric assessment, including measurement of height, weight, waist and hip circumferences, and calculation of BMI and waist-to-hip ratio. Clinical hyperandrogenism was assessed using the modified Ferriman-Gallwey score by an experienced gynecologist. Participants were also evaluated for acne and androgenic alopecia. Pelvic ultrasonography was performed transabdominally or transvaginally between days 2 and 5 of the menstrual cycle, depending on anatomical and personal factors. Ovarian volume was calculated using the ellipsoid formula, and participants with structural abnormalities or dominant follicles larger than 10 mm were excluded. Fasting venous blood samples were collected after a 13-hour overnight fast. Biochemical tests included fasting glucose, insulin, lipid profile (total cholesterol, LDL-C, HDL-C, triglycerides), liver function tests including AST (aspartate aminotransferase), ALT (alanine aminotransferase), ALP (alkaline phosphatase), GGT (gamma-glutamyl transferase), and bilirubin fractions. Renal function markers included creatinine, blood urea nitrogen, and estimated glomerular filtration rate. Additional measurements included albumin, uric acid, and platelet count. Thyroid function was assessed with thyroid-stimulating hormone (TSH), free triiodothyronine (free T3), and free thyroxine (free T4). Hormonal assays, performed between days 3 and 5 of the menstrual cycle, included follicle-stimulating hormone (FSH), luteinizing hormone (LH), estradiol (E2), anti-Müllerian hormone (AMH), total and free testosterone, sex hormone-binding globulin (SHBG), prolactin, and the free androgen index. Insulin resistance was calculated using the HOMA-IR formula. Liver steatosis and stiffness were measured using Vibration-Controlled Transient Elastography (FibroScan®, Echosens, Paris) following at least 12 hours of fasting. All procedures were performed by a senior hepatologist blinded to the clinical and laboratory findings. CAP (Controlled Attenuation Parameter) values were used to evaluate hepatic fat content, and liver stiffness was measured in kilopascals (kPa). Measurements followed strict quality control standards including a minimum of 10 valid acquisitions, a success rate of 60% or higher, and an interquartile-to-median ratio of 0.30 or lower. CAP and stiffness cut-off values were applied according to published clinical thresholds. To exclude secondary hepatic or endocrine conditions, all participants were screened for viral hepatitis (HBsAg, Anti-HCV, HCV RNA), HIV (Anti-HIV ELISA), and abnormal thyroid or renal function. Individuals with a history of liver disease, viral hepatitis, hepatotoxic drug use, ALT levels greater than twice the upper limit of normal for more than three months, or a personal or first-degree family history of liver cancer or autoimmune liver disorders were excluded. Pregnant or breastfeeding women were also not included. The aim of this study is to evaluate whether PCOS independently contributes to hepatic steatosis, beyond known factors such as obesity and insulin resistance, and to assess the clinical utility of FibroScan as a non-invasive liver assessment tool in this patient population.