Walch classification of glenoid morphology in primary glenohumeral osteoarthritis (illustration)
Diagnosis not applicable
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type A: centered humeral head, concentric wear, no subluxation of the humeral head
- A1: minor central erosion
- A2: major central erosion, humeral head protruding into the glenoid cavity
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type B: humeral head subluxated posteriorly, biconcave glenoid with asymmetric wear
- B1: narrowing of the posterior joint space, subchondral sclerosis, osteophytes
- B2: biconcave aspect of the glenoid with posterior rim erosion and retroverted glenoid
- B3: monoconcave and posterior wear with >15° retroversion or >70% posterior humeral head subluxation, or both
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type C
- C1: dysplastic glenoid with >25° retroversion regardless of the erosion
- C2: biconcave, posterior bone loss, posterior translation of the humeral head
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type D
- glenoid anteversion or anterior humeral head subluxation <40°
Case Discussion
Modified from: Bercik M, Kruse K, Yalizis M, Gauci M, Chaoui J, Walch G. A Modification to the Walch Classification of the Glenoid in Primary Glenohumeral Osteoarthritis Using Three-Dimensional Imaging. J Shoulder Elbow Surg. 2016;25(10):1601-6.