Someone can correct me if I am wrong. Once tumors are high grade they stay that way even when they come back after a period of remission. That is the danger in they can an will grow and invade to the muscle then to the bladder wall quicker than low grade. Hence the continual monitoring for the rest of our lives.
DX 5/6/2008 TAG3 papillary tumor .5 CM in size. 2 TURBS followed by 6 instillations of BCG weekly with a second round of 6 after a 6 week wait.