[Congenital disorders of the colonic innervation. A diagnostic guide].

Hirschsprung's disease (HD, aganglionosis) is the most important form of congenital disturbance of intestinal innervation, requiring surgical intervention. Furthermore, hypoganglionosis of the transitional zone forms the most significant factor in morbidity. Pre-operative definition of the length of neuronally disturbed segment is still a diagnostic challenge for both clinical physician and pathologist. Enzyme histochemical studies form the method of choice, but certain limitations in their use must be observed. Other dysganglionoses, particularly the so-called "Intestinal Neuronal Dysplasia" (IND) cannot-because of an excessive overlapping with age-correlated normal values-unequivocally be defined as an entity on its own. The only exception to this, is the ganglionic neuromatosis, which arises as part of a genetic illness.