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Am J Dermatopathol. 2004 Dec;26(6):463-71.

Expression of CD10 in basal cell carcinoma.

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Department of Pathology, Faculty of Medicine, Oita University, Oita 879-5593, Japan.


We investigated the expression of CD10 by an immunohistochemical method in 51 basal cell carcinomas (BCCs), eight pilomatricomas, five trichoblastomas, two trichofolliculomas, three sebaceomas, five sebaceous carcinomas, ten syringomas, two spiradenomas, ten poromas, four porocarcinomas, one eccrine duct carcinoma (not otherwise specified, NOS), six mixed tumors of apocrine origin, and nine squamous cell carcinomas (SCCs). We detected strong expression of CD10 in tumor cells of BCC (86%), and found that the smaller the number of positive tumor cells, the larger the number of positive stromal cells, in particular in sclerosing BCCs. Spearman's rank correlation test revealed a significant negative correlation in BCCs between the expression of CD10 in tumor cells and that in stromal cells (P = 0.001). In all pilomatricomas (100%) and in four trichoblastomas (80%), strong expression was also detected in tumor cells. There was no detectable expression in trichofolliculomas. One sebaceoma (33%) and two sebaceous carcinomas (40%) expressed CD10 in a similar fashion to BCCs. All tumors of eccrine gland origin, including syringoma, spiradenoma, poroma, porocarcinoma, and eccrine duct carcinoma (NOS), did not express CD10. Five mixed tumors (83%) were immunopositive. In SCC, CD10 was overexpressed only in the stromal cells. These findings support the hypothesis that BCC is derived from the folliculo-sebaceous apocrine unit, especially having the same origin as trichoblastoma and pilomatricoma. CD10 might be an indicator of tumor invasiveness if it is expressed in stromal cells, while it might be a marker of follicular differentiation if it is expressed in the actual tumor cells of cutaneous epithelial neoplasms.

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