MR arthrographic demonstration of an unusual multiplication anomaly concerning the glenohumeral ligaments.

The glenohumeral ligaments (GHLs), localized thickenings of the anterior joint capsule, are important passive stabilizers of the shoulder joint. A 29-year-old man was admitted for evaluation of left shoulder pain. The conventional magnetic resonance (MR) imaging showed a thickened anterior labroligamentous complex. MR arthrography revealed a multiplication anomaly of all the GHLs. The purpose of this study was to demonstrate the MR arthrography findings of this unusual anatomic variation of the GHLs.