Borrelia burgdorferi is a major cause of morbidity in wooded area in western Europe and the eastern seaboard of the U.S.A. Diagnosis of late stage infection and associated disorders may be difficult and often requires an array of different diagnostic procedures. Here we report an 11-year-old girl with acrodermatitis chronica atrophicans affecting all four limbs and parts of the trunk. The diagnosis was made on the basis of clinical appearance, serological and histopathological findings, and the lesional detection of B. burgdorferi-specific gene segments by polymerase chain reaction. This very unusual, severe case illustrates that despite being a late manifestation of tick-borne B.burgdorferi infection, usually occurring in adults, acrodermatitis chronica atrophicans may already appear at a young age and may be characterized by extensive skin involvement.