Thanks, your answer helps a lot. I could barely find any information on melanomas and Mohr surgery, except that it's typically used for the more common types of skin cancer, which doesn't help at all. Does Mohr surgery typically have a big scar? It's possible I got the surgeries mixed up- my dad wasn't entirely clear, because they are trying to keep me from worrying. Thinking on it more, I think he had a biopsy, then Mohr surgery, and then maybe excision? He has a really big scar on the side of his chest, around his rib cage.