School ager with abdominal pain Pediatric Imaging Gastrointestinal July 19, 2021May 21, 2021 AXR AP shows a marked amount of stool in the ascending colon that decreases somewhat in the transverse and descending colon but that massively distends the rectum to fill almost the entire pelvis. The diagnosis was constipation. Related Published July 19, 2021May 21, 2021