Male, 48 years old, with left shoulder arthritis. Evaluate the glenoid. No fracture is evident. Severe osteoarthritis affects the glenohumeral joint with bone on bone apposition. Multiple subcentimeter subchondral lucencies penetrate the articular surface of the humeral head and glenoid, representing erosions. A large joint effusion is also noted (better seen on the patient's prior MRI). These findings raise the possibility of an underlying chronic inflammatory arthritis. Fluid is also seen distending the biceps tendon sheath.Please note that rotator cuff tearing and tendinosis seen on the prior MRI are not well visualized on the current CT study.A large, normal variant os acromiale is again noted. Moderate osteoarthritis affects the acromioclavicular joint.Note is made of a patulous esophagus with a dependent fluid level. If there is clinical concern for a motility disorder, further evaluation with an esophagram may be considered.The remaining bony and soft tissue structures are within normal limits.
Severe arthritic changes at the shoulder joint as described above with multiple small erosions and a large joint effusion suggesting osteoarthritis with an underlying chronic inflammatory arthritis.