Why is anal sex still taboo? The intermediary stages would be gradually increasing sizes of intussusception. External complete rectal prolapse rectal procidentia, full thickness rectal prolapse, external rectal prolapse is a full thickness, circumferential, true intussusception of the rectal wall which protrudes from the anus and is visible externally. Med Health R I. International Journal of Colorectal Disease. Essentially, rectal prolapses may be. Defecographysigmoidoscopytransrectal ultrasoundmucosal biopsyanorectal manometry and electromyography have all been used to diagnose and study SRUS.
This operation aims to "remove the anorectal mucosa circumferential and reinforce the anterior anorectal junction wall with the use of a circular stapler".
As most sufferers are elderly, the condition is generally under-reported. The lower rectum is anchored to the sacrum through fibrosis in order to prevent future prolapse. If the prolapse becomes trapped externally outside the anal sphincters, it may become strangulated and there is a risk of perforation. Rectopexy has been shown to improve anal incontinence fecal leakage in patients with rectal intussusception. The precise cause is unknown,    and has been much debated.