I'm currently undergoing HBO treatments. I had 13 dives at one hospital and so far the charges from that facility have total over $15,000 (average of $1,200 per dive). Switched hospitals and have completed 27 dives there, with 5 more to go. I haven't received any statements from that facility yet.
In 2006 I had 33 radiation therapy sessions. Total cost was $55,630.
My oral cancer saga began in June 2005 with surgery, and so far my medical bills have totaled over $130,000 for medications, tests (CT, PET, MRI, etc), doctor visits, treatment.
Fortunately I have good health insurance and my out of pocket expenses have been minimal.