Synovial osteochondromatosis

Case contributed by Utkarsh Kabra

Presentation

Pain, no history of trauma

Patient Data

Age: 20 years
mri

Multiple loose bodies of varying sizes are seen in axillary recess, subscapularis recess/subcoracoid bursa, along bicipital groove splaying biceps tendon and along greater tuberosity likely extending between supraspinatus and infraspinatus tendon fibers. Few loose bodies are also seen between fibers of supraspinatus myotendinous junction.
Cortical irregularity is seen involving head of humerus, bicipital groove with subcortical cystic changes along greater tuberosity.
Fraying of anterior glenoid labrum is seen.
Small marginal osteophytes are seen along gleno-humeral articular aspects.
Acromion is type 2 with early acromioclavicular joint arthropathy.

CT confirms the findings on MRI.

Case Discussion

Findings are consistent with synovial osteochondromatosis which has lead to secondary osteoarthritic changes.

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