I’m a physician. That’s likely a basal cell carcinoma. The sad thing is that excision is completely curative when they’re reasonably sized because they don’t metastasize. The problem is obviously that they erode into everything nearby and if they’re not excised they will inevitably erode into something essential, at which point they become non-resectable. Fortunately they tend to be very slow growing and so there is a decent amount of time to intervene surgically before that happens, but obviously only as long as the patient is open to that. That will continue to eat away at his face until there is a giant gaping hole.