Serious causes of rectal pressure are less common and include diverticulitis, rectal prolapse ... It is between the last segment of the colon (the sigmoid colon) and the anal sphincter. 1. Anal ...

Results: Over a 3.5-year period, 10,124 endoscopic procedures of the colon (8,987 colonoscopies and 1,137 flexible sigmoidoscopies) were performed. There were 15 colonic perforations (0.15%).