Here's what's happening:
JO has undergone all the necessary tests and conferred with doctors from both the Celtics and the Heat and so far all doctors are in agreement--there's nothing structurally wrong with JO's knee. He just needs rest.
The problem is, JO's knee is still mysteriously swelling, something the docs are chalking up to 'normal wear and tear' and a possible 'arthritic condition'.
As of now, due to the level of pain and swelling, 'normal wear and tear' is not a satisfactory diagnosis for JO. As such, he's sending out his MRI results to another doctor in NY, hoping he'll see something the others have missed.
So, we're really in a gray area here, and unfortunately for JO this has happened before with him. There are just some knee injuries can't be detected by an MRI or X-ray. In some cases, it's only after exploratory surgery that the real cause of discomfort is discovered. The back story with JO is that he apparently played 2 seasons on a torn meniscus that was misdiagnosed when he was with Indiana--and I'm sure that's what's in the back of his mind when he feels the pain in his knee and is told it's 'normal wear and tear'. He's been told that before, believed it, and got burnt. He doesn't want that to happen again, and so he's been extra cautious.
So, going forward, JO will probably continue to elicit opinions until some doctor somewhere recommends surgery. That's my guess anyway. Given JO's inability to play in pain, his history of mysterious knee injuries, I think it's safe to say he's searching for a surgical option, that is unless the swelling goes down and pain goes away in the meantime.