Joe,
I also had a large tumor - 4 cm - that was blocking my left ureter orifice on my first TURB. It had grown to such a large size over many years of being misdiagnosed with blood in my urine. Finally, because it was very painful to urinate with large clots of blood breaking forth a cysto was done and the large tumor seen. My pathology report from that initial tumor came back as papillary T1a grade 11 of 111. It was later downgraded to a TA grade ll then later downgraded to TA grade 1 on another recurrence. So you see, the size doesn't indicate the severity of the tumor. My urologist was originally concerned that he may have damaged the opening to the left ureter from the TURB and that scarring may close off that opening to the kidney. It didn't, thank goodness but because my recurrences have all been low grade, the urologists state the risk of the scarring is greater concern to me than the recurrent low grade tumors. I understand, now, that becuase of the location and the low grade does not warrent complete deep radication of the tumor so I can expect recurrenc, that laser of that area is safer, more complete. Tissue samples can also be taken prior to laser.