Prospective study of 41 shoulder-surgery patients imaged with both CT and MRI. It tests whether Goutallier's CT-based fatty degeneration grading can be reliably applied to parasagittal MRI, and whether the two methods agree. It also asks whether fatty degeneration tracks with muscle atrophy.
Fatty degeneration of the cuff muscles is a decision-making variable, not just a descriptive finding. Advanced degeneration predicts poor repair outcomes and reduced strength, which is why we push to repair tears before the muscle degenerates.
This paper validates that Goutallier grading works on MRI, the modality most centers now use instead of CT. That matters because the original classification was CT-based. The practical pitfall: CT and MRI grades agree only fairly. Do not compare a baseline CT grade to a follow-up MRI grade, and do not pool the two in a study. Pick one modality and stay with it.
Remember that fatty degeneration and atrophy move together and both worsen with more torn tendons and more elapsed time. A stage 4 muscle usually comes with humeral head migration and is often beyond straightforward repair.
Prospective study of 41 shoulder-surgery patients imaged with both CT and MRI. It tests whether Goutallier's CT-based fatty degeneration grading can be reliably applied to parasagittal MRI, and whether the two methods agree. It also asks whether fatty degeneration tracks with muscle atrophy.
Fatty degeneration of the cuff muscles is a decision-making variable, not just a descriptive finding. Advanced degeneration predicts poor repair outcomes and reduced strength, which is why we push to repair tears before the muscle degenerates.
This paper validates that Goutallier grading works on MRI, the modality most centers now use instead of CT. That matters because the original classification was CT-based. The practical pitfall: CT and MRI grades agree only fairly. Do not compare a baseline CT grade to a follow-up MRI grade, and do not pool the two in a study. Pick one modality and stay with it.
Remember that fatty degeneration and atrophy move together and both worsen with more torn tendons and more elapsed time. A stage 4 muscle usually comes with humeral head migration and is often beyond straightforward repair.