Molar pregnancy--associated ectopic decidua: report of a case and review of the literature

Ectopic or extrauterine decidual transformation is regularly associated with pregnancy. This phenomenon has been observed most often in the ovary and cervix. Sporadic reports have documented decidua formation of peritoneal surfaces, lymph nodes and other organs in pelvic and abdominal cavity. Molar pregnancy-associated ectopic decidua has never been documented. We report the case of ectopic decidua at posterior surface of uterus, near the cul de sac, in a 45-year-old woman with molar pregnancy. The article review reveals that it is the first report of molar pregnancy-associated ectopic decidua.