Coexistence of superficial pemphigus and psoriasis.

We describe a case of the coexistence of psoriasis and pemphigus erythematosus. The coexistence of these two diseases may be more than coincidental: the effects of one immune-mediated skin disease may influence the occurrence of another. Possible mechanisms include antigen modification, altered regulation of T-cell activity, and plasminogen activator abnormalities.