Nodular hidradenoma of the breast: A case report with literature review.

Nodular hidradenoma or clear cell hidradenoma is a rare skin adenexal tumor which arises from eccrine sweat glands. Skin adenexal tumors situated in the breast parenchyma are still very rare and is one of the differential diagnoses of breast tumors. Failure to identify its morphologic features may lead to a mistaken diagnosis and over treatment.