I looked into the hypoxia matter, as Cheyrl mentioned, being anemic, and possibly chemo and and radio resistant due to the multiple recurrnces. The old theory is oxygen feeds cancer, but in agreement with Ed with angeogenesis which makes the tumor, and new area for blood supply, hypoxic, and so cancer thrives in low oxygen they now say. They did studies with HBOT, to inprove hypoxia for radiation, but there was no real benefit in some, some say it did or did not cause any negeative effects, They have a few meds that are or were used that had more benefit, forget names. Oxygen may have an effect during surgery, with the oxygen pressure levels on the tumor itself, which I can't fully explain, understand, that can increase tumor growth, if it's not the correct levels.

I had 30 HBOT treatments for an extraction 4 months after radiation, two months before a recurrence. It's a good question to ask your RO, and the dr with HBOT, who may be a wound management, that may have more knowledge about this.