Peristomal cutaneous Crohn's disease by contiguity.

Peristomal ulcer is a frequent complication that, in most cases, is mild and responds to topical treatment. In much less frequent cases, it is associated with other pathologies, such as Crohn's disease, requiring in these cases systemic treatment, including surgery. The differential diagnosis between Cutaneous Inflammatory Bowel Disease and Pyoderma Gangrenosum is interesting, although both are managed in a similar way.