n SA Journal of Radiology - Humeral avulsion of the glenohumeral ligament : the J sign : case report

Volume 18, Issue 2
  • ISSN : 1027-202X
  • E-ISSN: 2078-6778



The lesion resulting from humeral avulsion of the glenohumeral ligament (HAGL) is an important cause of anterior glenohumeral instability and can be seen in isolation or combination with an antero-inferior labral complex lesion. A conclusive magnetic resonance imaging diagnosis is aided when either a joint effusion is present or a contrast arthrography of the shoulder is performed. It is important to be familiar with the J sign as it represents contrast leaking through the defect in the lateral attachment of the joint capsule.

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