I found 2 black nevus in my head (about 0.5 cm diameter) recently and was told by doctor I have L parietal and R temporal scalp nevus that need surgery for excision and further testing. I'm afraid it's a skin cancer and apparently my uncle also carries nevus all over his face and body, that's why I suppose the root is mainly from genetic heritage. Is there any chance I can read from appearance if this is fatal or not, and what kind of treatment & the chance of survival