Acute generalized Hailey-Hailey disease.

A patient with extensive histologically proven Hailey-Hailey disease is described whose initial clinical presentation was suggestive of erythema multiforme or toxic epidermal necrolysis. This potentially misleading morphology of acute proven Hailey-Hailey disease has not been described previously and may be a consequence of bacterial infection exacerbating acantholysis.