File:Acromioclavicular joint ganglion and long head of biceps brachii dislocation (Radiopaedia 12938-13043 A 1).jpg

Summary:

• Radiopaedia case ID: 12938
• Image ID: 634499
• Modality: Ultrasound
• System: Musculoskeletal
• Findings: Non-compressible, cystic mass at the site of the swelling, which appeared to communicate with the AC joint. The biceps tendon has dislocated medially out of the bicipital groove. It appears thin and irregular, likely due the lipping seen at the groove in the image on the left. Dislocation of the tendon out of the groove implies rupture of the transhumeral ligament, which is an extension of the coracohumeral ligament over the groove. This is likely due to tearing seen at the distal insertion of the subscapularis tendon, which lies adjacent to the groove.
• Published: 6th Feb 2011
• Source: https://radiopaedia.org/cases/acromioclavicular-joint-ganglion-and-long-head-of-biceps-brachii-dislocation
• Author: Brendan Cullinane
• Permission: http://creativecommons.org/licenses/by-nc-sa/3.0/

Licensing:

Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)