Intussusception of the rectum and the solitary ulcer syndrome.

A general review is given of the intussusception of the rectum, the paradoxical contraction of the pelvic floor syndrome and of the solitary ulcer syndrome. The latter is in most cases a symptom of the other two as is the descending perineum syndrome. The conditions are diagnosed by defecography, proctosigmoidoscopy and EMG. The etiologies are unknown. The treatment is either conservative or operative.