Coexisting lichen planus and bullous pemphigoid or lichen planus pemphigoides?

A patient with lichen planus pemphigoides is reported. Initial pathologic and immunopathologic evaluation was consistent with coexisting bullous pemphigoid and lichen planus. However, further immunologic evaluation suggested that the circulating antibody was not directed toward bullous pemphigoid antigen but another basement membrane zone antigen. This finding indicates a need for immunologic re-evaluation of lichen planus pemphigoides.