Non-teratomatous ossification of the ovary, a rare entity: case report and review of the literature.

Ossification in non-teratomatous ovaries is extremely rare. This phenomenon may occur in various non-neoplastic or neoplastic ovarian diseases. A 34-year-old woman presented with lower abdominal pain of about 3 months. Transvaginal ultrasonography and plain abdominal radiography revealed an ovoid, calcified mass in left adnexa. Computed tomography (CT) demonstrated a well-defined cystic lesion measuring 7.7 × 5.1 cm with internal hemorrhage and peripheral curvilinear calcifications. The patient underwent laparoscopic surgery. The cut surface revealed a hemorrhagic cyst with a hardened wall and a muddy, yellow surface. Histologic examination revealed an ovarian hemorrhagic cyst with ossification. The authors present an unusual case of ossification in the ovary associated with an old hemorrhagic cyst and include a review of the literature.