Thanks Jo*Mar, I will look it up.

Cyclist, I didn't really get anything from the article abstract. I understand they used CT scans to determine of those 4 causes - but was there action taken? I know for sure it isn't inadequate rib resection or an intact scalene.

Regardless, I'm certainly not going to jump into any procedures without some research - though I am immediately limited on options as I am dealing with Workers' Compensation. Who knows if they will even approve any further treatment. That's why I have an attorney.