Classic Type (Hirschsprung´s Disease)

Operative findings in a 4-month-old girl with constipation. The surgeon is holding a dilated upper sigmoid; orally from it a distinctly narrower part of the sigmoid and of the upper rectum is visible. It is a classic type of Hirschsprung's disease; the transitional zone lies in the sigmoid. The intestinal wall of the megacolon held between the fingers is thickened due to the secondary hypertrophy of the musculature. Also, $$obst_2??££the earlier form presented under histological examinations §§ belongs to the classic (or short-distance) type of Hirschsprung's disease; however, there, the transitional zone lies in the rectum.