Fr. Mike, While it may be a "setback" for you it could have been much worse and so I am happy for you!
As to the other comments about "stomping out" the cancer and why some treatment options are not suggested, remember that both radiation and chemo can potentially kill the patient as well as the cancer (that may be a 100% success rate by some statistics

) so especially with chemo not showing a huge benefit it may not be worth the risks in every case.
More for us to have to ponder! Do the best you can to live.