So we spent a few weeks trying to decide if the biopsy ( general anesthesia , etc ) was worth it since it was anticipated by all to be inflammation. Ironically the one doc who really pushed us to reverse course and get the biopsy is the same one who is saying wait 8 weeks and rescan. What the heck? In your case Don, since you have the strong evidence of no impact by chemo, you have concrete evidence to base your decision to wait on . Poor sentence structure there but you get my idea, I hope. Thanks for sharing your experience.