Malformations of the rectum

Congenital malformations is comparatively rare, about 1 out of 5,000 newborn. There are a total lack of message rectum with the external environment or the opening of its gleam in an unusual place perineum, or in the lumen of any neighboring body (Fig. 1). Most often there are full atresia anus (see).
Rarely observed dermoid cyst, penetrating from the ovary into the wall and into the rectum, and pozavcherashny cysts and tumors of displaced during embryogenesis epithelial elements of the intestine, which can be a source of development pozavcherashny cancers not directly related to the rectum.
To congenital malformations promejnostei sacrococcygeal region also include epithelial coccygeal moves and cysts ("pilonidal cyst"), which opened in the form of fistula in mezhyagodichnoy folds; usually they are mixed with paraproctitis. Location strictly on an average line with fistula in mezhyagodichnoy folds, the lack of communication from the rectum, the presence of hair protruding from the fistula, help to distinguish this disease from paraproctitis.

Fig. 1. Various forms of atresia and congenital fistula rectum and anus (Red): 1 - atresia of the anus; 2 - atresia rectum; 3 - atresia of the rectum and anus; 4 - perineal atresia of the anus; 5 - scrotal atresia of the anus; 6 - vestibular atresia of the anus; 7 - vaginal atresia of the anus; 8 - cystic atresia of the anus; 9 - urethral atresia anus.