Summary and ConclusionsMassive rectal prolapse is due to a loss of the normal posterior curve of the rectum and rectosigmoid in which the rectum becomes a straight tube and intra‐abdominal pressure is exerted in its long axis, causing intussusception.Anterior rectal displacement takes place because of a congenital mesorectum or loose presacral areolar tissue that prevents fixation of the rectum posteriorly in the hollow of the sacrum.Anterior displacement of the rectum may be demonstrated by lateral x‐ray and cinefluorography of the barium‐filled rectum while the patient is straining.Rectal prolapse can be corrected by posterior fixation of the rectum and rectosigmoid using a Teflon® mesh sling.