ORN untreated prognosis? Hubby is 10 post OC, 5 yrs ago had ORN diagnosed, underwent 30 HBO dives. That slowed the disease down, but he has refused surgery to remove the dead bone. Now and then, he removes a tiny shard of bone himself, so obviously the problem is still growing. Lots of pain, wondering what the expected progression is: I believe it will spread to his cervical spine and travel from there. Does anyone else know how the effects of non treatment will happen. I'm sure the final outcome won't be pretty, but he refuses further treatment and I would like to know what to expect.