Enhancement in the manubriosternal joint. Mild irregularity of the joint surfaces - cortical erosions, shown clearly on the CT study. Low signal on all sequences on both sides of the joint, compatible with sclerosis, shown on the CT study.
The sternoclavicular joints are symmetrical and of normal appearance, without evidence of edema or synovial enhancement. Normal bone marrow signal in all other bones included in the study. The fat planes, the muscles, and the neurovascular structures are preserved.
In summary:
Erosive arthritis of the manubriosternal joint.