Evidence of an association between bullous pemphigoid and psoriasis

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Abstract
The medical records of 62 consecutive patients with bullous pemphigoid and 62 case-matched leg ulcer controls were examined to determine whether psoriasis and bullous pemphigoid are associated. Psoriasis occurred in seven of the pemphigoid patients (11%) but in none of the controls. The prevalence of psoriasis in the pemphigoid sample was significantly higher than expected (P<0.01, Poisson distribution). This difference, together with the clinical course, suggests that there may be an association between pemphigoid and psoriasis.