Oberholzer, Pieter J.2015-05-202015-05-202014-12-05Oberholzer PJ. Humeral avulsion of the glenohumeral ligament: The J sign. S Afr J Rad. 2014;18(2); Art. #709, 2 pages. http://dx.DOI/org/ 10.4102/sajr.v18i2.7091027-202X (print)2078-6778 (online)10.4102/sajr.v18i2.709http://hdl.handle.net/2263/45197The 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.en© 2014. The Authors. Licensee: AOSIS OpenJournals. This work is licensed under the Creative Commons Attribution License.Glenohumeral ligament (HAGL)Antero-inferior labral complex lesionAnterior instabilityMagnetic resonance imaging (MRI)Inferior glenohumeral ligament (IGHL)Article