[Benign non-specific ulcer of the colon. 3 new cases]

Three cases of solitaries ulcers of the colon verified by an anatomo-pathological examination of the excision piece are presented. The accent is put on the research of an etiologic factor. The part of a vascular pathology appears probable without been proved. In the ignorance in which we are, for the while, of the natural history of these ulcers, the treatment by surgical excision is justified to prevent acute complications.