Abstract
A 58-year-old Japanese male presented with a cutaneous mixed tumor containing ossification and hair matrix differentiation on the left side of the chin. Histologically, the tumor consisted almost exclusively of apocrine-type epithelial ductal structures and chondroid stroma. Strands and aggregation of basaloid cells which contained keratinous cystic structures with a column of shadow cells arising from basophilic basaloid cells, sebaceous duct-like structures, and ossification in the stroma were also evident. These findings suggest that cutaneous mixed tumors with ossification and hair matrix differentiation are related to both the whole hair follicle and the sweat apparatus.
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