Placental bed nodule: a rare benign entity.

Placental bed nodule.

Abstract

Background: The placental bed nodule is a rare lesion of the intermediate trophoblast that represents an incomplete involution of the placental implantation site. 

Clinical Case: We present the case of a 26-year-old woman who consulted for intermestrual bleeding and coitorrhagia, after evacuating uterine curettage six months earlier. An endometrial aspirate biopsy was performed, the result of which was a nodule in the placental bed. Hysteroscopy was performed in which a 2-cm polyp was visualized, which was resected, and the histology was confirmed after polypectomy. 

Conclusion: The diagnosis of placental site nodule is histological and must be thorough in order to differentiate this entity from other potential gestational trophoblastic neoplasms. With regard to risk factors, both cesarean section and evacuating uterine curettage are procedures that predispose to the development of this entity.