A 32-year-old woman presents to the gynecology clinic with irregular menstrual cycles, with periods occurring every two to three months. She denies weight loss, fever, or a family history of hormonal disorders. Physical Examination: Bimanual pelvic examination reveals a firm, non-tender, mobile adnexal mass on the right side, approximately 5 cm in size. Diagnostic Findings: The mass is confirmed to be a Sertoli-Leydig cell tumor, and laboratory evaluation is requested to confirm the hormonal profile of the tumor. What laboratory finding is most indicative of a Sertoli-Leydig cell tumor?
