7452 A Diagnostically Challenging Case of Hyperandrogenism in Postmenopausal Woman

Abstract Disclosure: M.S. Hossain: None. S. Hossain: None. B. Gautam: None. H. liao: None. S.C. Kumar: None. D.S. Rosenthal: None. Background: The diagnosis of new-onset severe hyperandrogenism in postmenopausal women is rarely encountered, posing a unique challenge for clinicians. Ovarian hyperthecosis and androgen-secreting tumors are the usual suspects in post menopause. In our case ovarian hyperthecosis is the primary consideration but elevated 17-OH Progesterone (17-OHP) introduces the potential co-existence of Non classical congenial adrenal hyperplasia (NCCAH) or rare instances of Sertoli-Leydig Cell Tumor (SLCT). Case Presentation: A 70 years old female, with no past medical history, referred to the Endocrinology clinic for significantly elevated testosterone level. She reported excessive hair growth in various areas of her body since 2022, which required shaving almost every day. She also reported male pattern hair loss and weight loss of 15 lbs over the last three months. She denied headache, vision changes, deepening of voice, history of fertility problems and use of exogenous testosterone. Her vital sign were normal. On examination, she had clitoromegaly, terminal hair growth on her upper lip and chin, breast atrophy, male pattern baldness, but no cushingoid or acromegaly features. Blood tests showed significantly elevated total testosterone: 1422 ng/dl (2-45); free testosterone: 147.9 pg/ml (0.2-3.7) and Estradiol: 64 pg/ml (Postmenopausal 31) with low LH: 7.6 mIU/ml (Postmenopausal 10.0-54.7) and FSH: 22.2 mIU/mL (Postmenopausal 23-116). Her serum ACTH, DHEA Sulfate, 11-deoxycortisol, 17 OH pregnenolone, TSH, Free T4, prolactin, IGF-1 were normal while her 17-OHP: 396 ng/dl (45 ng/dl) was significantly elevated. An ACTH stimulation test showed 17-OHP level of 734 ng/dl at 30 minutes and 901 ng/dl at 1 hour. Pelvic ultrasonography: right ovary of 2.3 x 1.6 x 1.9 cm and the left ovary of 3.1 x 1.8 x 3.0 cm. MRI showed normal adrenal glands but a prominent left ovary. Patient was referred to the Obstetrics department to undergo bilateral oophorectomy for the definitive diagnosis and treatment. Discussion: The current ACTH stimulation test for non-classical congenital adrenal hyperplasia is validated for premenopausal women but lacks standardization in post-menopausal state. In our case, distinguishing the source of elevated 17-OHP between adrenal (NCCAH) and ovarian (SLCT) was difficult. Unexpected asymmetry in ovarian size observed in our case further complicates the scenario, contrasting with the typical symmetrical enlargement seen in ovarian hyperthecosis. Pending surgical pathology will further guide the management. This case highlights the complexity of diagnosing hyperandrogenism in postmenopausal women, emphasizing the significance of thoroughly exploring differential diagnoses and meticulously analyzing laboratory results. Presentation: 6/2/2024