Pyomyoma in a perimenopausal woman with intrauterine device

Pyomyoma (suppurative leiomyoma) is a rare disease, which is considered to be a serious complication of uterine leiomyoma. Since 1945, only 18 patients have been reported and ours is the 19th. Although it is frequently reported in pregnant women or postmenopausal women who have vascular disease, our case is a 42-year-old woman in the perimenopausal period who presented with fever and a tender lower abdominal mass. She used the intrauterine device as a contraceptive method but leiomyoma had never been found before. Ultrasonographic findings suggested an ovarian tumor. She was diagnosed as having infected malignant ovarian cancer with an elevated CA 125 level that was initially treated with broad spectrum antibiotics; then she underwent total abdominal hysterectomy and bilateral salpingo-oophorectomy. Pathological findings showed acute and chronic inflammation of the endometrium with abscess formation in an intramural leiomyoma. The intrauterine device might be the origin of pyomyoma due to a direct spread of the infection from the uterine cavity. Pyomyoma may be difficult to diagnose especially in those with a nonspecific clinical presentation without any history of leiomyoma. Delayed diagnosis may result in serious complications, whereas adequate surgery and broad spectrum antibiotics may decrease serious morbidity and mortality.