a review of the literature suggests that many clinical features of assumed crohn 's disease in elderly patients are atypical and would be most consistent with an ischemic pathogenesis : rarity of fistula , low recurrence rate , low rate of small intestinal involvement and extra-intestinal manifestations , and increased incidence of major colonic bleeding would best fit with an ischemic pathogenesis in at least some of these patients .
C0010346
crohn 's disease
C0021853
intestinal