Lipid cell tumors are extremely rare tumors of the ovary which are usually malignant when larger than eight centimeters. Fibromas, on the other hand, are the most common type of benign ovarian solid tumors. Neither one of these tumors are known to be accelerated by the pregnant state. We report a case of a healthy 15-year-old female who was found to have an ovarian mass during pregnancy. This fibroma weighed more than 3,800 grams and mimicked a lipid cell tumor. Cesarean section and unilateral oophorectomy resulted in a good outcome for both mother and child.
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