Multiple erythema migrans--manifestation of systemic cutaneous borreliosis.

Erythema migrans is the clinical hallmark lesion of a stage I infection with Borrelia burgdorferi. Multifocal lesions are rarely observed in Europe and thus may be missed, in particular when the typical clinical appearance of the pronounced advancing margin is missing. We present three patients with such a clinical appearance which caused differential diagnostic problems. Multiple erythema migrans represent an early stage of systemic infection. Thus early diagnosis and rapid initiation of therapy are warranted.