A 32-year-old woman with a complicated obstetrical history entered the hospital with complaints of menorrhagia, dysmenorrhea, extreme nervousness, and anorexia. The most significant finding at operation was the presence of multiple pearly nodules scattered about the pelvic peritoneum, especially about the fimbria of the uterine tubes. The nodules proved to be typical granulomata, presumably tuberculous, and antituberculous therapy was begun immediately after surgery. Further studies, however, revealed ova of Enterobius vermicularis in the patient's feces and also in the granulomatous lesions. A family history of infestation with pinworms was elicited. An 8-day course of piperazine citrate (1.0 gm. twice daily) cleared up the infestation, and 6 weeks after surgery the patient was free from symptoms.