Diverticulum formation in Crohn's disease of the colon

Three patients are described with ulceration of the colon in whom the disease was complicated by the formation of diverticula. In one patient this took the form of pseudo-diverticulum formation, which is well recognised, but in the others diverticula were wide-necked, and in one patient followed deep ulceration, a finding which does not appear to have been described before. In the latter it is suggested the diverticula are projections of mucosa through the fibrous scar of the healed ulcers.