Thursday, November 17, 2011

The J Sign

The intact inferior glenohumeral ligament normally extends from the glenoid labrum to the anatomic neck of the humerus, forming a U shape on oblique coronal images. Avulsion of the right inferior glenohumeral ligament from the neck of the humerus results in its humeral end falling inferiorly forming a J shape. This J-shaped appearance of the torn right inferior glenohumeral ligament in cases of humeral avulsion of the glenohumeral ligament (HAGL) is referred to as the J sign. On the left side, the J is reversed.

Special thanks to Dr. David Wells for the case.


Carlson CL. The "J" sign. Radiology. 2004 Sep;232(3):725-6.

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