A Primate Model for the Study of Colitis and Colonic Carcinoma describes recent observations of the prevalence, pathogenesis, natural history, and time-course of idiopathic colitis and colonic carcinoma in the Cotton-Top Tamarin (CTT) model. Results of colonoscopy and mucosal biopsy are shown to evaluate the therapeutic efficacy of new anti-colitic agents. The contributions of antigenic profiles as a function of disease state, occurrence of extra-intestinal manifestations, and possible causal agents of colitis are also discussed. Prevalence of spontaneous CTT colonic carcinoma is considered...