Infant with urinary retention and constipation Pediatric Imaging Genitourinary August 24, 2021July 14, 2021 Lateral image from a barium enema shows displacement of the rectum anteriorly by a presacral mass which is eroding into the rectum and causing the extravasation of a small amount of contrast from the rectum posteriorly. The diagnosis was sacrococcygeal teratoma. Related Published August 24, 2021July 14, 2021