[Pathology of Crohn disease in children].

Incidence, macroscopic and histological appearance, and systemic manifestation of Crohn's disease in children are discussed. The main criteria for the differentiation between idiopathic inflammatory bowel disease (Crohn's disease and ulcerative colitis) and acute self-limited colitis (infectious colitis) of the intestinal tract are reviewed. Finally, a description of the morphology of precancerous changes and their clinical implications in Crohn's disease (and ulcerative colitis) is given.