[The Nikolowski trichoadenoma: a rare tumor of the ENT area].

A case of trichoadenoma Nikolowski in a 74-year-old woman is reported. The tumour invaded the upper lip, the base of the columella and the left nasal entrance. The tumour was cured by surgery and plastic reconstruction of the defect. This benign lesion of the hair follicles is rare and therefore often misdiagnosed as basal cell carcinoma or seborrheic keratosis. Examination of tumour cells by DNA-flow cytophotometry showed a normal diploid DNA-content of the tumour cells.