Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 52 1 2014 01 15 88 90 EN Soraya Salehgargari Department of Obstetrics and Gynecology, Mahdiyeh Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Behrokh Sahebdel Department of Obstetrics and Gynecology, Mahdiyeh Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Ali Zare Department of Clinical & Anatomical Pathology, Mahdiyeh Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Hassan Abolhassani Department of Obstetrics and Gynecology, Arash Hospital, Tehran University of Medical Sciences, Tehran, Iran. 2015 10 11 Ectopic decidualization with gross involvement of the peritoneum is one of the rare findings in pregnant women particularly when ectopic decidualization disseminated as an asymptomatic intra-abdominal nodule. We present here a case of an ectopic decidualization in a 33-year-old pregnant woman with symptoms of irritable bowel syndrome during pregnancy. https://acta.tums.ac.ir/index.php/acta/article/view/4721 https://acta.tums.ac.ir/index.php/acta/article/download/4721/4575