Low-grade clear cell eccrine carcinoma.

Two patients had facial tumors that had a distinctive microscopic appearance. Each consisted of multiple nests of glycogen-filled clear cells dispersed in the dermis and associated with a hyalinized, collagenous stroma. There were also ductular features suggestive of eccrine differentiation. The lesions had a locally infiltrative microscopic appearance, and one involved the subcutaneous fat and skeletal muscle. Although neither tumor has recurred following excision, we believe that they are low-grade eccrine carcinomas and that they may represent a distinctive, albeit rare, subtype of adnexal neoplasm.