[Diagnosis and treatment of Hirschsprung's disease in adolescence].

Hirschsprung's disease is the most frequent cause of large intestinal obstruction in the neonatal period, during which the majority of cases are diagnosed. In about 5 of cases diagnosis is not established until adolescence. We present a 12-year-old boy with Hirschsprung's disease, treated since childhood for constipation. Early diagnosis avoids complications.