Giant congenital hairy nevus on the scalp

Congenital nevi or birth marks are hyperpigmented macular lesions that are derivatives of the melanoblasts. They occur in less than 1% of the neonates in any site of the body. Nevi larger than 9.9 cm in diameter occur in 1 per 20,000 newborns. 50% have hair on them. They vary in size, shape, color and texture. They have the propensity to become malignant as the child grows, so, regular follow up should be done to interfere if there is a risk of malignancy: The risk depends mainly on the size of the nevus. We report here a giant hairy nevus on the scalp that have a size of about 15 cm and occupied almost half of the scalp surface. No other associated anomalies were found and the patient is under regular follow up in our clinic