Abstract

The decidual cast is endometrial tissue that spontaneously falls out from a the vagina with in the original shape of the endometrial cavity. There were about 20 cases in the current literature in pediatric age group.

Herein, we report a 13 year old girl presented with abdominal pain and vaginal bleeding. Physical examination and laboratory findings were normal. The histeroscopy revealed a 4 cm sized nodular mass on the anterior uterine wall. Histopathological evaluation revealed atrofic endometrial glands within dense supuration, necrosis and stromal decidualisation. The final pathologic diagnosis was desidual cast.

The decidual cast must be encountered in the differential diagnosis of intrauterin mass in children.