[Colitis marginal to cancer. Apropos of 7 cases].

The authors report 7 new cases of colitis above a carcinoma. The study of these cases and of those reported in the literature shows the main pathological characteristics of the lesions and permits discussion of the pathogenesis. Chronic ischemia caused by an increase in intraluminal pressure above the neoplastic stenosis seems to be the main etiological factor.