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Anatomic and CT scan assessment of Teres Minor: a new index of trophicity
C Szymanski1, O Boniface, X Demondion
1Orthopedics Dept A, Roger Salengro Hospital, Lille Regional University Hospitals, Lille, France. arcadia.szymanski@gmail.com
Introduction:
The present study reports the development of a CT assessment protocol for Teres Minor (TM) trophicity.
Hypothesis:
Quantitative reproductible Terres Minor assessment on CT estimates the influence of muscle trophicity on the clinical and radiological results of palliative treatment of irreparable rotator cuff tear.
Materials And Method:
An anatomic study of 30 cadaveric shoulders confirmed a constant anatomic relation between Terres Minor and the inferior pole of the glenoid cavity. This landmark was used to develop a novel CT assessment of TM trophicity.
Results:
The CT assessment showed excellent inter- and intra-observer reproductibility. The protocol defines a trophicity index, T2/G (T2 being TM thickness on axial CT slice, and G the maximum glenoid cavity thickness on axial slice), enabling reproductible TM analysis on preoperative arthro-CT.
Conclusion:
The study validated the CT protocol, allowing application in pre- and postoperative assessment of irreparable rotator cuff tear.
Level Of Evidence:
Level IV. Retrospective study.
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