Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 60 4 2022 04 24 254 255 Hamed Aminiahidashti Department of Emergency Medicine, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran Mohammad Aminiahidashti Department of Emergency Medicine, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran 2021 07 13 2021 12 26 Fecaloma is a very hard stool often located in the rectum of the sigmoid colon. A 63-year-old man with abdominal distention and urinary retention was admitted to an emergency department. Abdominal CT scans showed a urinary bladder displaced by fecaloma. Fecaloma is an infrequent cause of acute urinary retention, especially in bedridden patients with underlying diseases. https://acta.tums.ac.ir/index.php/acta/article/view/9536