The hoops are more lengthy than difficult. First is that all of the treatment has to be over, and it has to have been "successful"--though considering the docs won't use the term "cured", I'm not sure what the FAA means by "successful". In any event, I was grounded from October through May, plus a 3 week hiatus waiting for the FAA to react.
My diagnosis was in September, my radiation treatment actually started in November, and it was finished on January 14th. So the time from January 14th until late May was recovering from the radiation (extreme fatigue), periodic PSAs to prove that zapping had done the job, recommendations from my oncologist and urologist, and a standard Class II, deferred until the FAA would react.
My AME is very experienced and has a good relationship up the line, so I think that had a lot to do with getting it through the FAA relatively quickly. Then the letter came. The SI letter is written in horrible language--makes you think as you read the first paragraph that you'll never fly again, and then says you will.
From then on, it's jumping through the specific hoops spelled out in the SI letter, whatever they may be. It used to be that the letter had to be with the pilot at all times while flying, but that's been lifted.
Cary