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and melanoma.

Blue nevi are more common in females than males. It was first studied in 1906 by Tièche, a student of Josef Jadassohn.

Classification

Blue nevi may be divided into the following types:

* 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.
* A blue nevus

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