-
Hyperkeratosis of the Nipple and AreolaHyperkeratosis of the Nipple and Areola. Hyperkeratosis of the nipple and/or areola (HNA) is defined as excessive keratinization of the nipple and/or areola.
-
Acanthosis NigricansAcanthosis Nigricans. Although Addison may have seen a case of acanthosis nigricans (AN) before 1885 and misdiagnosed it as Addison disease, the first ...