A rare case of bilateral pelvic mass

A case of 69- year-old woman with large pelvic mass and ascites is reported in this paper. With the exception of mild pelvic pain and a Pelvic mass in pelvic, she had no symptom or sign. All routine and hormonal Lab tests and tumor marker's were normal. The MRI revealed a large mass in anterosuperior of uterus, and left ovary was situated in neighborhood of pelvic mass.Her Uterus normal, with a small cyst in the right ovary. The total abdominal hysterectomy and bilateral salpingo- oophorectomyrevealed a large cream solid mass (16×8× 8 Cm, 1260 gr) in the left ovary. Nonetheless the right ovary had normal appearance with a cyst (3×2.5Cm). There was some free fluid in the pelvic cavity. The ovarian mass was identified as fibrothecoma, the right ovarian cyst as serous cystadenoma, but no malignant cells found in free fluid. This case had interesting features, because first clinical features suggesteda bilateral malignancy in pelvic, but she had two different tumors which were benign.Also, the occurrence of bilateral fibrothecoma and serous cystadenoma wererare. Furthermore, we did find no similar case in the literature.