Discovery of a fully ossified transverse humeral ligament during biceps tenodesis: a case report

The transverse humeral ligament (THL) is a robust, elastin-deficient fibrous sheath that spans the intertubercular sulcus (IS) between the greater (GT) and lesser (LT) tubercles of the humerus.5 Functioning as a retinaculum, it stabilizes the long head of the biceps tendon (LHBT) within the bicipital groove (BG) as the humerus glides around the relatively fixed tendon during arm elevation and rotation.9 Due to its lack of elastin, the histological identity of this fibrous structure remains debated; some investigators suggest that it represents an extension of the subscapularis tendon rather than a true ligament.