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The rotator cable is a thick bundle of fibres cradling the distal end of the supraspinatus tendon which is known to have an avascular area that is prone to tears termed the rotator crescent. The rotator cable is thought to provide stress shielding when the rotator crescent weakens and tears. We attempted to retrospectively investigate the rotator cable in 62 patients with known rotator cuff tears diagnosed on ultrasound (U/S) imaging. We hypothesized that the rotator cable is less visible in severe tears and in older patients. In our study, we found that the cable was visualized in 89% of patients with partial-thickness tears (n=29) and in 75% of patients with incomplete full-thickness tears (n=16) but in 0% of patients with complete full-thickness tears (n=17). It was also found that the rotator cable visibility significantly decreased as patient age increased. Based on the results of our study, we can infer that the lack of the biomechanical stress shielding provided by the rotator cable to the rotator cuff in patients with incomplete full thickness tears predisposes the patient to a complete tear. Thus, the presence of an intact rotator cable can be used as a prognostic factor when deciding on a treatment plan for patients with varying degrees of rotator cuff tears. *Correspondence to: Hema Choudur, Professor of Radiology, Head: Division of MSK Imaging, McMaster University, Hamilton General Hospital, 237 Barton St. E, Hamilton, On L9L 2X2, Canada, Tel: 905-527-4322 ext 46521; E-mail: hnalinic@yahoo.com; choudur@hhsc.ca Received: June 15, 2018; Accepted: June 21, 2018; Published: June 29, 2018 Abbreviations: FTT: Full thickness tear; iFTT: incomplete FTT; cFTT: complete FTT; REB: Research Ethics Board; MRI: Magnetic resonance imaging; NS: Not seen; NWS: Not well seen; PTT: Partial thickness tear; RC: Rotator cable; SS: Supraspinatus; U/S: Ultrasound; WS: Well seen.

Ultrasound Characteristics of the Rotator Cable in the Presence of Rotator Cuff Tears