label: Melanoma Arising in Giant Congenital Nevus
label_lc: melanoma arising in giant congenital nevus
description: A melanoma arising in a giant congenital melanocytic nevus. The risk of developing a melanoma in a giant congenital melanocytic nevus has been reported to be between 5% and 50%. The incidence of developing melanoma is higher before the age of 10 and in adult life.