1985 Volume 27 Issue 1 Pages 119-125
Most intraluminal diverticula are located in the duodenum, other sites are extremelyrare. To our knowledge, this is the second reported case of cecal intraluminal diverticulum. A 48-year-old male was admitted to Kariya General Hospital with a chief complaint of right flank pain. Barium enema revealed a pedunculated polyp-shaped tumor in the cecum. Endoscopic examination showed an elevated lesion covered with normal mucosa, which appeared a submucosal tumor. A small orifice was recognized at the top of the tumor, which was retrospectively seemed to be a typical feature of intraluminal diverticulum. The tumor was resected by endoscopic polypectomy. Resected specimen was sac-shaped with a thin wall, 2×2×3cm in size, and contained a clayey fecal mass. Microscopic examination revealed that the wall was covered on both sides with colonic mucosa with the muscularis mucosae, and no muscular layer was seen between them. We suppose that an acquired small intramural diverticulum was distended by the fecal inflow. This pulsion diverticulum, if restrained by the muscular wall of the colon, could eventually grow into lumen, carrying a layer of the mucosa before it.
