Massive postpartum corpus luteum cyst: a case report.

A young woman presented with an asymptomatic unilateral adnexal mass at six weeks postpartum. Her abdomen and pelvis had been considered unremarkable upon examination at parturition, at which time no adnexal masses were palpated. At laparotomy a 20 cm. right ovarian cyst was found, which was shown microscopically to be of corpus luteum origin. Each of the features--size, rapid development, and presentation in the postpartum state--is most unusual.