A skin biopsy is the most common test used to diagnose<unk> . The biopsy will detect growth of new or abnormal tissue. Another test that can be performed is using immunohistochemistry, but it is inconsistent. Markers used to detect<unk>  consist of carcinoembryonic antigen, progesterone receptors, estrogen receptors, epithelial membrane antigen, pancytokeratins, and cytokeratin 7.
Eccrine carcinoma
Apocrine gland carcinoma
Microcystic adnexal carcinoma
Cylindroma
Ductal carcinoma
Hidradenocarcinoma
Trichoblastoma
Adenoacanthoma