Ectopic decidual reaction – A diagnostic dilemma

The occurrence of decidualization outside the endometrium, is called as ectopic decidual reaction. It can involve any abdominal organs, such ovary, fallopian tube, cervix, uterine surface, omentum, etc. and present grey white nodules. These nodules grossly mimic metastatic disease granulomas, causing a diagnostic dilemma. Decidual reaction benign condition regress spontaneously in postpartum period. Thus, it important to accurately diagnose these lesions for optimal treatment. Histologic examination followed by immunohistochemistry be performed on biopsies sampled during cesarean sections, tubal ligation, appendectomy, obtain correct diagnosis. Peritoneal location decidua less frequent an incidental finding. Few patients may with symptoms pain, hemorrhage or irritable bowel syndrome. We thereby, report case peritoneal discuss its histopathological features, differential