Nevus, Congenital Melanocytic
Nevus, Congenital Melanocytic Definition
A type of melanocytic nevus (or mole), congenital melanocytic nevus is found in infants at birth. It is located in the area of the neck and head 15% of the time occurring in about 1% of infants in the United States. Its appearance is similar to those of acquired one but is usually larger in diameter and may have excess hair, called hypertrichosis. Congenital melanocytic nevus microscopically appears similar to acquired nevi with two notable exceptions. The neval cells are found deeper into the dermis for congenital virus, and the deeper neval cells are found along with neurovascular bundles with surrounding sebaceous glands, hair follicles and subcutaneous fat.