Catalog
Dermal melanocytosis
Link to WHO Definition
Dermal melanocytosis – http://id.who.int/icd/entity/1628237102
The presence at birth of functional melanocytes within the dermis. Most commonly this is as a result of incomplete migration of melanocytes to the epidermis as in lumbosacral dermal melanocytosis (Mongolian spot). Less commonly it is due to circumscribed hamartomatous proliferation of melanocytes in the dermis (e.g. Naevus of Ota).