751.2 Atresia and stenosis of large intestine, rectum, and anal canal
Absence:
anus (congenital)
appendix, congenital
large instestine, congenital
rectum
Atresia of:
anus
colon
rectum
Congenital or infantile:
obstruction of large intestine
occlusion of anus
stricture of anus
Imperforate:
anus
rectum
Stricture of rectum, congenital