TUBULAR APOCRINE ADENOMA WITH ECCRINE AND APOCRINE IMMUNOPHENOTYPES OR PAPILLARY TUBULAR ADENOMA

A case of papillary tubular adenoma is reported. On microscopic examin ation the lesion, located on the scalp, showed a tubular-branching pat tern, opening on the skin surface, and features of decapitation secret ion. Immunohistochemical evidence of both eccrine and apocrine differe ntiation was found. This case, which on a clinicopathological basis al one could be classified as tubular apocrine adenoma, illustrates the d ifficulties in contrasting the latter to its eccrine counterpart (papi llary eccrine adenoma) and suggests that the terms papillary tubular a denoma or tubulopapillary hidradenoma more accurately describe these l esions.