While certainly agreeing with the other posters there are some factors at play here that have bearing on the type of skin cancer as well as helping the Doctors with a prognosis. One of the major considerations is the family history. If your father's family doesn't have a history of cancers, that's certainly in his favor as is the answer to the question, did he experience a "blistering" sunburn as a child or adolescent? If one or more such sunburns were experienced it, often, greatly increases the chances of cancer as well as spreading or returning. Additionally, on site says "... having skin lesions known as actinic keratoses can increase your risk of developing skin cancer. These precancerous skin growths typically appear as rough, scaly patches that range in color from brown to dark pink.
Obviously, only your doctor can answer your question(s) with any accuracy...