Michael,
My mom has to regularly see her dermatologist (every 2 months) because after the radiation she has developed SCC in various spots that the radiation was given. The spots come up as crusty reddish color tags on her skin. They are a pain but they assure her they are not a recurrance from her cancer but a new skin cancer all on its own. My mom is blonde hair blue eyes and has spent many years in the sun so this cancer may have come out at any time but the radiation really brought it out. Just check with your dermatologist when you have a chance. I'm so happy that you have finished treatment. Things will only get better from here!
Hugs,
Dani