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: https://doi.org/10.4102/sajr.v18i2.709 | © 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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Abstract

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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