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REASSESSMENT OF FATTY INFILTRATION BY MAGNETIC RESONANCE TEN YEARS AFTER ROTATOR CUFF INJURY REPAIR
Alberto Naoki Miyazaki1, Luciana Andrade DA Silva1, Caio Santos Checchia1
1Santa Casa de Misericordia de Sao Paulo, Faculdade de Ciencias Medicas, Departamento de Ortopedia e Traumatologia, Grupo de Cirurgia do Ombro e Cotovelo, São Paulo, SP, Brazil.
Acta Ortopedica Brasileira
|July 20, 2023
Summary
Rotator cuff repair shows no change in fatty infiltration over ten years. Muscle trophism improves immediately post-surgery but returns to baseline levels, indicating stable long-term outcomes for rotator cuff repair.
Area of Science:
- Orthopedic Surgery
- Musculoskeletal Imaging
- Biomedical Engineering
Background:
- Quantitative assessments of rotator cuff muscle changes post-repair are limited.
- Existing semiquantitative and subjective assessments yield controversial findings.
- A hypothesis suggests an immediate decrease in fatty infiltration post-surgery.
Purpose of the Study:
- To quantitatively reassess rotator cuff fatty infiltration and muscle trophism.
- To evaluate these parameters ten years after successful rotator cuff repair.
Main Methods:
- Prospective comparative study of 10 patients with rotator cuff injury.
- Serial MRI scans: preoperative, immediate postoperative, and 10-year late postoperative.
- Comparative analysis of muscle trophism and fatty infiltration across time points.
Main Results:
- Muscle trophism and true muscle percentage were significantly higher in the immediate postoperative period.
- Fatty infiltration showed no statistically significant difference across the three observed periods (preoperative, immediate, and 10-year postoperative).
Conclusions:
- Fatty infiltration remains unchanged in the rotator cuff over ten years post-repair.
- Muscle trophism increases immediately after surgery but returns to preoperative levels by the ten-year mark.
- Long-term rotator cuff repair demonstrates stable muscle trophism and fatty infiltration compared to baseline.
