This document contains radiological reports and images from barium studies showing various gastrointestinal conditions: 1. A lateral view shows a cricopharyngeus muscle throughout a swallow and a moderately large cricopharyngeal diverticulum exerting pressure on the esophagus. 2. Images show hypertrophic pyloric stenosis producing narrowing of the stomach antrum and duodenal bulb. 3. A barium esophagram demonstrates a type III hiatal hernia with organoaxial rotation. 4. Images show a microcolon with good barium evacuation in a delayed 24-hour film, presenting microcolon. 5. Images show abnormal rectosigmoid index