[Unilateral nevoid syringoma].

A case of unilateral naevoid syringoma is reported. Syringoma is an adnexal benign neoplasia originating from the ducts of eccrine sweat glands. Localized (neck, anterior portion of the chest, genitalia, fingers) and generalized forms are known, but unilateral naevoid syringoma is quite uncommon. The existence of this variety can be explained with reference to the theory of "genetic mosaicism".