Bilateral theca lutein cysts: a rare cause of acute abdomen in pregnancy.

Theca lutein cysts (hyperreactio luteinalis) are benign cysts usually associated with molar pregnancy. We report a case of bilateral theca lutein cysts with normal intrauterine singleton pregnancy presenting as an acute abdomen requiring surgical intervention. Laparotomy revealed bilateral theca lutein cysts one of which was torted, necessitating salpingo-ovariotomy.