Ovarian Fibroma is a rare benign sex cord stromal tumor of the ovary. Fibroma are most frequently seen in middle aged women. Pelvic pain is the most common symptom of ovarian fibroma. Tumor can reach a large size at presentation. Ovarian fibroma usually misdiagnosed preoperatively as uterine leiomyoma. We present an unusual case of fibroma of the ovary presenting at 20 years of age, less than the usual age reported in the literature. In this case, diagnosis was not confirmed preoperatively. At laparotomy, the solid ovarian mass was found originating from left ovary, and the microscopic examination confirmed the diagnosis of the ovarian fibroma. This report represents the preoperative misdiagnosis of the ovarian fibromas and the conservative ovarian surgery for the ovarian fibromas.
