Hyperreactio luteinalis: intraoperative finding during a cesarean section in a twin pregnancy.

Bilateral ovarian enlargement can be found in the course of a cesarean section. It is necessary to keep in mind that hyperreactio luteinalis is a benign condition, because the appropriate management is conservative. We present an unexpected, intraoperatively diagnosed case of bilateral ovarian cystic-solid tumours (13 cm) in a twin pregnancy.