Skin cancer (such as malignant melanoma and other types) may develop in up to 15% (1 out of 6) of people with larger or giant nevi, often in childhood. The risk is higher for larger or giant congenital nevi located on the back or abdomen.
What to expect if I have Giant congenital nevus  (Outlook/Prognosis)?
Skin cancer (such as malignant melanoma and other types) may develop in up to 15% (1 out of 6) of people with larger or giant nevi, often in childhood. The risk is higher for larger or giant congenital nevi located on the back or abdomen.