Cystic rectal duplication: a rare cause of neonatal bladder-outlet obstruction and hydronephrosis

A case of cystic rectal duplication (RD) is presented. A 7-day-old female w as admitted with acute urinary retention, voiding difficulty, and abdominal distention since she was 4 days of age. Ultrasound and abdominal computed tomography (CT) demonstrated a huge, cystic mass in the pelvis and abdomen that resulted in acute urinary retention and bilateral hydronephrosis, CT-g uided drainage of the lesion followed by transabdominal surgical excision r esulted in a cure. Pathologic examination demonstrated a RD lined by respir atory epithelium.