I had basil cell skin cancer. The family doctor sent me to a specialist for a bi-op that identified it as basil. The specialist's procedure was thought to be unique at the time (mid-90's). An appointment was set up to deal with it. He shaved (cut) small layers of skin from the affected area. Then I would have to wait until the layer was examined in the lab. If it was still present, another was taken, and so on... until there was no sign of the cancer left.
Haven't had any issues since but it was alarming at the time. I find it strange that the doctor didn't have you get a biopsy to identify the kind/type of cancer/pre-cancer it is.
Anyway, keep any eye on it and have regular check-ups... Ardbeg is always helpful.
Keep well PD.