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Define a melanocytic nevus. Name TWO types of common nevi.

Benign congenital/ acquired neoplasm of melanocytes caused by somatic gain of function mutation in BRAF/RAS gene.

A mutation is the characteristic of nevi & absence in melanoma.
types of common nevi

  1. Congenital nevus
  2. Common nevus
  3. Dysplastic nevus
  4. Blue nevus
  5. Miescher nevus
  6. Unna nevus
  7. Meyerson nevus

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