crhon's disease

An update of rectal bleeding in children is made with special emphasis in the diseases that produce it according to different group of ages, the differential diagnosis and the diagnostic methods specially colonoscopy and its value in Ulcerative Colitis and Crhon's Disease.

Meckel's diverticulum is the most common congenital anomaly of the gastrointestinal tract, occurring in 1-3% of autoptic studies. It's remnant of the omphalomesenteric duct which connects the primitive gut to the yolk sac in early fetal life and the failure of obliteration may result in an omphalomesenteric fistula, an enterocyst, a fibrous band connecting the small intestine to he umbilicus. It's a true diverticulum arising from the antimesenteric border of the small bowel and often is associated with inflammatory bowel disease...