Hobo.... the first year after treatment I couldn't care less about flying, and certainly not the aerobatic routines I loved so much before cancer, I was glad to be walking around town. By year two after treatment I started to feel like my old self again, (or at least a weak carbon copy of the old me) and I spent some time in a Pitts S2B with a safety pilot just to get back in the saddle. By year three I was ready to start pulling serious g's again, and that's when I realized that not being physically fit as I was before was going to temper my flying. I never had an issue with the FAA and my medical. Unlike cardiac events, which can take someone out at the stick and in the air during PIC time (a definite hazard to flight) after recovery from a first event, cancer isn't really on their radar as a condition that recurrences seem to concern them much. I went for a new flight physical, my history of oral cancer was noted, but no restrictions were put on my ticket. It was pretty much up to the examining doc as to whether or not I was good to go. FAA regs require that the FAA be informed by the ticket holder if "potentially compromising medical events" take place during the period covered by the medical exam. Failure to do so can cause permanent loss of your ticket regardless of your health later on. But at least in my case, once I was ready to fly again and take the flight physical, no one asked how long I had been out of treatment. As a side note since you are a pilot, I have never (6 year out now) been able to develop the physical ability to tolerate the maneuvers I used to do. I am very content though to do some very basic aerobatics (loops, rolls, spins, hammerheads, etc.) and enjoy the flight as opposed to viewing the experience like I did before, when more aggressive flying was a test of man and machine. I'll leave that to the young guys. Besides, you know the saying..."There are old pilots, and there are bold pilots, but there are no old, bold pilots". I think that besides cancer, age has caught up with me.