Abnormal signal on right rib in MRI

Hi,

I've been reading the posts here and found them helpful. My wife is 28 years post treatment. Thankful for that. She's been having some problems with her arm and shoulder. Our doctor prescribed an Xray, which found nothing, then an MRI of the shoulder and rotator cuff. That was all fine. But the report said there was evidence of marrow signal abnormality of the right first rib, incompletely visualized.

Even after so long we went into a panic. We have an appointment with an oncologist in a week, but of course as anyone could guess we're very nervous.

We're hoping this could be a result of long ago radiation or something else no so bad.

Has anyone had something like this ? Any advice would be appreciated.

Thanks, all