Diffuse Peritoneal Deciduosis in Pregnancy : A Case Report

Deciduosis or ectopic decidua is the presence of a group of decidual cells outside the endometrium. Walker was the first to define the condition in 1887(1). In pregnancy, the occurrence of ectopic deciduas was observed in ovaries, uterus and tubes, while localization in peritoneum was rare(2-6). It is important to differentiate between this benign phenomena and Mesothelioma , malignant carcinoma and metastatic malignant Melanoma(7,8). We are reporting a case of ectopic deciduas in a 27-year -old lady who was asymptomatic during the course of her pregnancy, presented with preterm labour pain, and underwent ceasarean section due to Triplet pregnancy. The lesions were discovered accidentally; they were nodular covering most of the peritoneum and there was omental cake. Biopsies were taken to differentiate it from malignant conditions. Histopathological diagnosis confirmed deciduosis.