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DOI: 10.1148/radiol.2412050800
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(Radiology 2006;241:485-491.)
© RSNA, 2006

Musculoskeletal Imaging

US Appearance of the Rotator Cable with Histologic Correlation: Preliminary Results1

Yoav Morag, MD, Jon A. Jacobson, MD, David Lucas, MD, Bruce Miller, MD, Monica Kalume Brigido, MD and David A. Jamadar, MD

1 From the Departments of Radiology (Y.M., J.A.J., M.K.B., D.A.J.), Pathology (D.L.), and Orthopedic Surgery (B.M.), University of Michigan Medical Center, 1500 E Medical Center Dr, TC-B1-1234, Ann Arbor, MI 48109-0326. Received May 10, 2005; revision requested July 8; revision received December 8; accepted January 2, 2006; final version accepted January 20. Address correspondence to Y.M. (e-mail: yoavm{at}umich.edu).

Purpose: To characterize the ultrasonographic (US) appearance of the rotator cuff cable in asymptomatic shoulders and in cadaveric specimens, with histologic comparison for the latter.

Materials and Methods: The cadaveric portion of this study was approved by the institution's Anatomical Donations Department. Institutional review board approval and informed consent were obtained from asymptomatic volunteers and clinical patients for the HIPAA-compliant portion of the study. Four fresh cadaveric shoulder specimens (two male subjects, 40 and 50 years old) were dissected, assessed for the presence of the rotator cable, and imaged with 12-MHz US. Histologic slides (hematoxylin-eosin stain) from three resected rotator cuff tendons were inspected for fibers in the expected location and orientation of the rotator cuff cable. The shoulders in 17 asymptomatic volunteers (seven men, two women; age range, 27–66 years; mean, 41 years) and contralateral asymptomatic shoulders in 10 patients (six men, four women; age range, 24–78 years; mean, 49 years) were scanned and evaluated for the presence and appearance of the rotator cable.

Results: The rotator cable was identified at gross dissection. Histologic examination and US of the cadaveric shoulders demonstrated an articular-sided fibrillar structure perpendicular to the rotator cuff tendon (average thickness and width, 1.2 mm and 4.5 mm, respectively). US of asymptomatic shoulders depicted a similar fibrillar structure in three (11%) shoulders up to 1.1–1.5 cm medial to the greater tuberosity (average thickness and width, 1.2 mm and 4.5 mm respectively).

Conclusion: The rotator cable can be depicted with US.

© RSNA, 2006




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