Case Report: A Case of Mitotically Active Cellular Fibroma of the Ovary Misdiagnosed Preoperatively as Pedunculated Subserosal Uterine Leimyoma

Abstract

Cellular fibroma is the most common benign tumor of the ovary characterized by cellularity. Mitotically active cellular fibroma is a subtype of cellular fibroma showing mitotic activity, but no nuclear polymorphism or necrosis. These tumors are often misdiagnosed preoperatively as uterine myomas. A 42-year-old woman presented with pain in the right groin. Transvaginal ultrasound revealed a normal left ovary and a semisolid mass of approximately 4.5 x 5 cm originated from the right ovary. Pelvic MRI was reported as subserosal pedunculated uterine leiomyoma in the close antero-superior, right lateral proximity with the uterus fundus and the patient was scheduled for laparoscopic myomectomy. The excised mass was sent for the pathological examination, which resulted in the confirmed diagnosis of mitotically active cellular fibroma. The patient was informed about the local recurrence potential of cellular fibromas and frequent control visits were scheduled before the patient was discharged.