Five Cases of Primary Cutaneous Epithelial Tumors Which Could Be Histopathologically Differentiated from Porocarcinoma

Abstract

We report five cases of primary cutaneous epithelial tumors which could be histopathologically differentiated from porocarcinoma. Two cases were finally diagnosed as basal cell carcinoma, and three cases as squamous cell carcinoma. The lesions, which consist of both basaloid cells and squamoid cells, and/or which contain clefts, which are necessary to be distinguished from sweat duct, and/or from tumor cells that extend into the epithelial cells of sweat glands, are easy to be histopathologically misdiagnosed as porocarcinoma.