'Stony shoulder: an exuberant case of glenohumeral synovial chondromatosis with extra-articular extension

Description 

A 27-year-old man presented with a history of 4-year duration of mechanical pain in the left shoulder and a progressive reduction in the range of movements. In the physical examination stands out a swelling of stony consistency on the posterior aspect of the left arm, pain with all active and passive movements of the left shoulder associated with limitation of active and passive abduction above 90°.

The blood tests were normal. The X-ray of the left shoulder showed multiple calcified intra-articular and extra-articular loose bodies (figure 1).

Figure 1

Conventional left shoulder radiography: multiple calcified intra-articular and extra-articular bodies.

A shoulder MRI was ordered demonstrating exuberant expansion of all joint spaces and recesses from the glenohumeral interface to the subcoracoid and subscapularis recess and along the tendon sheath of the long portion of the biceps, which suggested cartilaginous nature with...

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