Whiplash injury and right shoulder pain following a motor vehicle accident.
Shoulder MR arthrography
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Partial anterior inferior chondrolabral separation at 2-4 o'clock.
Supraspinatus, infraspinatus, subscapularis, and teres minor tendons exhibit normal thickness, continuity and signal. The muscles are of normal thickness, without signs of atrophy or fatty infiltration. The long head of biceps exhibits normal thickness and signal and is located in its groove.
No fracture of the glenoid and no signs of hyaline cartilage damage or erosion.
Head of humerus and acromioclavicular joint: no pathological finding.
Persistent shoulder pain over a year after a motor vehicle accident. Partial anterior inferior chondrolabral separation on MR arthrography suspicious for a Perthes lesion (especially on axial PDW SPAIR sequence).
The differential is a sublabral recess, an anatomic variant.