Clinical study of the congenital melanocytic naevi in the child and adolescent.

Background: The classification of the congenital melanocytic nevus (CMN) and the magnitude of the risk of transformation into melanoma are still controversial.

Objective: To analyse the profile of the CMN in the child and teenager at IPPMG-UFRJ according to sex, skin colour, age, clinical type, locations and evolution.

Methods: Longitudinal study of retrospective and prospective cohort from 1994 to 2007.