Tubo-ovarian abscess (TOA) is usually encountered in sexually active women as a complication of pelvic inflammatory disease (PID). Its occurrence in sexually inactive patients is extremely rare and suggests atypical etiologies, including genital tuberculosis (GTB). We report a rare case of a sexually naïve young woman with a giant TOA due to isolated ovarian tuberculosis. This case highlights the diagnostic dilemma when tuberculosis mimics adnexal malignancy or pyogenic abscess and underscores the importance of maintaining a high index of suspicion, particularly in tuberculosis-endemic regions