Rectal prolapse involves the intussusception of the rectum. Several types of prolapse may occur, depending on the location, appearance and layers of the bowel wall involved.
A complete prolapse (procidentia) involves all layers of the bowel wall.
Type of Prolapse
Prolapsed Layers of Bowel
Length of Protrusion Beyond the Anal Verge
Appearance
mucosal prolapse
mucosa only
<= 2 cm
radial folds at junction with anal skin
complete prolapse, third degree
full thickness
does not pass through anus (occult, concealed, internal)
not visible
complete prolapse, second degree
full thickness; does not involve the mucocutaneous junction
2- 5 cm
circular folds early; edema may result in loss of folds
complete prolapse, first degree
full thickness; involves the mucocutaneous junction
>= 5 cm
circular folds early; edema may result in loss of folds
(from Table 1, page 66).
To read more or access our algorithms and calculators, please log in or register.
