Abstract
Background
In 1990, Hamada et al. radiographically classified massive rotator cuff tears into five grades. Walch et al. subsequently subdivided Grade 4 to reflect the presence/absence of subacromial arthritis and emphasize glenohumeral arthritis as a characteristic of Grade 4.
Questions/purposes
We therefore determined (1) whether patient characteristics and MRI findings differed between the grades at initial examination and final followup; (2) which factors affected progression to a higher grade; (3) whether the retear rate of repaired tendons differed among the grades; and (4) whether the radiographic grades at final followup differed from those at initial examination among patients treated operatively.
Patients and Methods
We retrospectively reviewed 75 patients with massive rotator cuff tears. Thirty-four patients were treated nonoperatively and 41 operatively.
Results
Patients with Grade 3, 4, or 5 tears had a higher incidence of fatty muscle degeneration of the subscapularis muscle than patients with Grade 1 or 2 tears. In 26 patients with Grade 1 or 2 tears at initial examination, duration of followup was longer in patients who remained at Grade 1 or 2 than in those who progressed to Grade 3, 4, or 5 at final followup. The retear rate of repaired supraspinatus tendon was more frequent in Grade 2 than Grade 1 tears. In operated cases, radiographic grades at final followup did not develop to Grades 3 to 5.
Conclusions
We believe cuff repair should be performed before acromiohumeral interval narrowing. Our observations are consistent with the temporal concepts of massive cuff tear pathomechanics proposed by Burkhart and Hansen et al.
Level of Evidence
Level III, Therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.
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Acknowledgments
We thank Professor Pascal Boileau for encouraging us to write this article. We also thank Dr Gilles Walch for fruitful e-mail discussions and for allowing us to use his roentgenograms. We dedicate this work to the memory of Emeritus Professor Hiroaki Fukuda.
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Each author certifies that he or she has no commercial associations (eg, consultancies, stock ownership, equity interest, patent/licensing arrangements, etc) that might pose a conflict of interest in connection with the submitted article.
Each author certifies that his or her institution has approved the reporting of these cases, that all investigations were conducted in conformity with ethical principles of research, and that informed consent for participation in the study was obtained.
This work was performed at Shizuoka Red Cross Hospital, Hakone National Hospital, Yamanaka Orthopaedic Clinic, and Tokai University Hospital.
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Hamada, K., Yamanaka, K., Uchiyama, Y. et al. A Radiographic Classification of Massive Rotator Cuff Tear Arthritis. Clin Orthop Relat Res 469, 2452–2460 (2011). https://doi.org/10.1007/s11999-011-1896-9
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DOI: https://doi.org/10.1007/s11999-011-1896-9