These five patients with cancer had a novel acantholytic mucocutaneous disease characterized by autoantibodies that were pathogenic after passive transfer. The autoantibodies from these patients reacted with an antigen complex composed of desmoplakin I and the 230-kd antigen of bullous pemphigoid and two as yet unidentified epithelial antigens. We suggest the term "paraneoplastic pemphigus" for this disease.
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