Biceps Instability

Disruption of the cranial third of the subscapularis tendon, either in isolation or associated with supraspinatus tendon tear, is often associated with biceps instability (Bennett 2001). When the cranial third of the subscapularis is torn, the biceps tendon tends to sublux superficial to it on cranial transverse scans and to rest in a normal position on caudal transverse scans (Fig. 6.117). When the subscapularis tear becomes complete, the biceps slips medially within the glenohumeral joint (Ptasznik and Hennesy 1995 Farin et al. 1995 Farin 1996 Prato et al. 1996). The US diagnosis of biceps tendon dis-... 

Rasmussen OS (2004) Anterior shoulder instability sonographic evaluation. J Clin Ultrasound 32 430-437 Read JW, Perko M (1998) Shoulder ultrasound diagnostic accuracy for impingement syndrome, rotator cuff tear, and biceps tendon pathology. J Shoulder Elbow Surg 7 264-271... 

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