[Hidradenoma of the skin. Synoptic reveiw of syringeal hidradenoma, eccrine epithelioma and eccrine basalioma (author's transl)].

An ulcerating and sclerosing skin tumour on the temporal forehead region is described. Histologically the tumour is composed of different structures as cystic hidradenoma, syringoma, ductal hidradenoma and sclerres as cystic hidradenoma, syringoma, ductal hidradenoma and sclerosing basalioma arranged in layers. The tumour appears to be a distinct and diagnosable entity. It exists a major similarity to such tumours reported as syringeal hidradenoma, eccrine epithelioma or eccrine basalioma.