They are nevi that are present at birth or soon thereafter. They are probably hamartomas, since they
contain many skin elements, but a predominance of melanocytes. Large congenital nevi have a low (5%)
but real risk for malignant transformation into melanoma. Hence, the need for prophylactic excision.
In a rare autosomal dominant condition, family members acquire with time many large nevi,
sometimes more than 100.
contain many skin elements, but a predominance of melanocytes. Large congenital nevi have a low (5%)
but real risk for malignant transformation into melanoma. Hence, the need for prophylactic excision.
In a rare autosomal dominant condition, family members acquire with time many large nevi,
sometimes more than 100.