[Surgical anatomy of the anal canal]

The anal canal is the terminal portion of the gastrointestinal tract, following upon the pelvic rectum, and opening in the posterior perineum at the level of the anal margin. The purpose of our work, through a dissection of the perineum and of the anus, is the study of their different components and connections. We begin by a cutaneous plan dissection, which put to bare the perineal and anococcygeous raphes, as well as the rich subcutaneous fat tissue, where various diseases can develop. After that, we study the anal canal connections, especially the ischiorectal fossas with their contents, than the anal sphincters and the different spaces existing between their bundles. We finish by the study of the internal anus configuration and wall components. Within the framework of the multiple proctologic diseases, the surgeon brought to intervene on the anus or the perianal region has to know well the different elements constituting of the anal canal, their disposition and connections, so as to avoid wounding the important anal canal functions

Rectal prolapse

Twenty-five interventions for rectal prolapse have been done for 23 patients during 20 years, 12 direct rectopexies, 9 Orr-Loygue procedures, 2 resections, Delorme's procedure for 1 patient and one cystectomy. We observed 4 recurrences i.e. 17,3%. Abdominal rectopexy seems to be the best treatment for rectal prolapse