Amelanotic blue nevus

Blue nevus
Classification and external resources
10 D22 (ILDS D22.L42)
DiseasesDB MeSH D018329

Blue nevus (also known as "Blue neuronevus," "Dermal melanocytoma," and "Nevus bleu"[1]) is a type of melanocytic nevus. These are usually described as non-cancerous,[2] but can be malignant.[3][4]


Blue nevi may be divided into the following types:[5]:701

  • A Patch blue nevus (also known as an "Acquired dermal melanocytosis," and "Dermal melanocyte hamartoma") is a cutaneous condition characterized by a diffusely gray-blue area that may have superimposed darker macules.[1]
  • Blue nevus of Jadassohn–Tièche (also known as a "Common blue nevus," and "Nevus ceruleus") is a cutaneous condition characterized by a steel-blue papule or nodule.[5]:701
  • Cellular blue nevi are a cutaneous condition characterized by large, firm, blue or blue-black nodules.[5]:701
  • Epithelioid blue nevi are a cutaneous condition most commonly seen in patients with the Carney complex.[5]:701
  • A deep penetrating nevus is a type of benign melanocytic skin tumor characterized, as its name suggests, by penetration into the deep dermis and/or subcutis. Smudged chromatic is a typical finding. In some cases mitotic figures or atypical melanocytic cytology are seen, potentially mimicking a malignant melanoma. Evaluation by an expert skin pathologist is advisable in some cases to help differentiate from invasive melanoma.[5]:701
  • An Amelanotic blue nevus (also known as a "Hypomelanotic blue nevus") is a cutaneous condition characterized by mild atypia and pleomorphism.[5]:701
  • A malignant blue nevus is a cutaneous condition characterized by a sheet-like growth pattern, mitoses, necrosis, and cellular atypia.[5]:701[1]

See also


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