Case Report

Humeral avulsion of the glenohumeral ligament: The J sign

Pieter J. Oberholzer
South African Journal of Radiology | Vol 18, No 2 | a709 | DOI: | © 2014 Pieter J. Oberholzer | This work is licensed under CC Attribution 4.0
Submitted: 04 August 2014 | Published: 05 December 2014

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Pieter J. Oberholzer, Department of Radiology, University of Pretoria, South Africa

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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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