This sits well with me, the only thing is the doctor brought up the exploratory. So I always try to look ahead to find alternatives if there is any. His Cat Scan came out good. His cystoscopy came out good but the urine that was tested shows cancer cells somewhere. He went through this for about 4 years then was cancer free. Will wait and see what happens. I just like to prepare for the future I guess. Does kidney biopsies require exploratory surgery? That is what the doctor recommended for him if the cells are still there after his maintenance treatment. Biopsies are different than exploratory surgery I would think. I doubt he could handle exploratory surgery. That is what concerns me.