6450 Leydig Cell Tumor: A Rare Cause of Post-menopausal Hyperandrogenism

Abstract Disclosure: R. Nakdali: None. S. Athimulam: None. Introduction: Ovarian steroid cell tumors are a rare subtype of sex-cord stromal tumors. Leydig cell tumors is a subtype of sex-stromal tumors that is found in < 1% of all ovarian tumors. They are typically benign, unilateral, and secrete androgens which causes virilization. Below we present the case of a postmenopausal woman who presented with signs of virilization and was diagnosed with an ovarian Leydig cell tumor. Case: A 62-year-old postmenopausal woman, with a history of partial hysterectomy with right oophorectomy presented to Endocrinology clinic for evaluation of thyroid nodules. However, clinically she had signs of virilization noted by the provider on examination. She reported progressive androgenic alopecia, cystic acne, oily skin, hoarseness of voice and hirsutism, with increase hair growth over upper lip, chin and jaw line requiring daily shaving. She denied taking any supplements. She reported embarrassment of these physical changes and prior providers had attributed this to aging, therefore not prompting further testing. This caused significant emotional distress to the patient, leading to isolation. Biochemical testing confirmed elevated bioavailable testosterone (193.1 ng/dL) and total testosterone levels (579 ng/dL), with no evidence of hypercortisolemia. Magnetic resonance imaging (MRI) revealed a heterogenous soft tissue mass (2.9 x 2.1 x 2.1 cm) in the left ovary. She underwent a left salpingo-oophorectomy and pathology confirmed a well-differentiated 2.4 cm Leydig cell tumor. Post-operatively, she reported improvement in facial and body hirsutism, reduced shaving frequency decrease in androgenic hair loss, with noticeable hair growth in her frontal scalp, and her skin became less oily with reduced acne. Post-operative labs confirmed cure of hyperandrogenism (Bioavailable testosterone < 2.6 ng/dL; Total testosterone: < 10ng/dL; and Free androgen index < 0.5%). She has been referred to genetics for evaluation. Discussion: Post-menopausal hyperandrogenism poses a diagnostic challenge as it can be mistaken for hormonal imbalances seen with aging. Often times, patients do not report symptoms due to embarrassment unless specifically addressed by provider. Initial testing consists of total and free testosterone and dehydroepiandrosterone sulfate (DHEAS) levels to assess the source of hyperandrogenism. Ruling out hypercortisolemia and assessment for ingestion of testosterone or DHEA supplements is vital. Pelvic ultrasound or cross-sectional imaging (CT or MRI) of abdomen and pelvis can identify structural abnormalities in the ovaries or adrenal glands. Prompt evaluation and management can alleviate significant distress to the patient. Leydig cell tumors represent a rare but important consideration in the differential diagnosis of postmenopausal hyperandrogenism, such as in our patient. Presentation: 6/2/2024