Pemphigoid and ulcerative colitis.

We report eight patients with ulcerative colitis who have subsequently developed pemphigoid. Four patients were investigated to determine the pattern of pemphigoid antibody staining on whole and chemically split skin and oral mucosa to distinguish between pemphigoid and epidermolysis bullosa acquisita. The findings were suggestive of pemphigoid with a predominantly epidermal pattern. Three patients were studied for the presence of antibodies against the colon (which were absent). The relationship between pemphigoid and ulcerative colitis is discussed in relation to a case-control study.