Benign teratoma of the omentum and ovary coexistent with an ovarian neoplasm.

Benign cystic teratoma of the omentum is a rare abdominal tumor. Review of the literature describes seven reported cases of omental teratomas in association with ovarian teratomas. Our patient is a 68-year-old woman who presented with an asymptomatic abdominal mass and uterine prolapse. Ultrasound revealed a right-sided, cystic and solid pelvic mass. CT scan revealed a second mass with calcifications situated along the right iliac crest. This is the first description of an omental teratoma in association with a benign ovarian cystic teratoma coexistent with a malignant neoplasm. Possible etiologies of the present case are discussed and additional literature investigated.