Diagnosis: Congenital hairy nevus
Description: Congenital nevomelanocytic nevus of the forehead with a pebbled surface and thick terminal hairs.
Morphology: Plaque
Site: Face
Sex: F
Age: 12
Type: Clinical
Submitted By: Shahbaz Janjua
Differential DiagnosisHistory:
This adolescent girl presented with a large dark brown plaque involving most of the forehead, and the frontal scalp since birth. The pebbly surfaced plaque was covered with thick terminal hairs. Congenital hairy nevi , also known as congenital nevomelanocytic nevi, are usually noted at birth or soon thereafter. Only 5% of the lesions are multiple but the location and size of a congenital hairy nevus may be variable. There is a significant potential for large congenital hairy nevi to become malignant.