[Skin biopsy as a clue - case report].

Skin biopsy is one of the most important diagnostic tools in dermatologic disorders. It is, however, necessary to combine histological findings with the clinical picture, and diagnosis will not necessarily be reached even from a technically successful biopsy without proper referral data. We describe a case in which biopsies taken from the skin rash of a febrile middle-aged man led to the correct tracks and the syphilis diagnosis was reached in collaboration with the clinician.