Polygons are 2-dimensional shapes. They are made of straight lines, and the shape is closed (all the lines connect up).
Rectopexy is a surgical procedure used to correct rectal prolapse, a condition characterized by a weakening of the muscles that hold the rectum in place. Though the exact cause of this problem is unknown, there are several conditions that may contribute to its development.
A rectocele may also be fixed abdominally at the time of a sacral colpopexy. Perineorrhaphy is surgical reconstruction of the muscles of the perineum, the area between the vagina and the rectum. This procedure involves reattaching a number of small muscles that normally connect in this area.