Perthes lesion

Case contributed by Dai Roberts
Diagnosis almost certain


Fall, ongoing shoulder pain. Labral signs. For MR arthrogram.

Patient Data

Age: 25 years
Gender: Male



Chondrolabral separation of the anteroinferior glenoid labrum from 3 - 6 o'clock (3 o'clock anterior) and the periosteum is intact, in keeping with a Perthes lesion.  Tiny Hill-Sachs defect.  Intact capsule with arthrogram solution adequately distending the joint.  

Case Discussion

Shoulder arthrograms are most frequently performed to assess for glenoid labrum tears.  Chondrolabral separation or detachment is when the bone and the labrum disconnect, with fluid extending between them and a Perthes lesion has chondrolabral separation with intact periosteum. 

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