Goutallier et al reported a grading classification for fatty degeneration of skeletal muscle in patients with torn rotator cuffs. The authors are from Hopital Henry Mondor and the University of Paris.
Imaging: CT or MRI
Findings on Imaging Studies
Stage
completely normal skeletal muscle without fat
0
muscle with a few fatty streaks
1
some fat present but less than the amount of muscle present
2
as much fat as muscle
3
more fat than muscle
4
Fatty infiltration Stage 2 or higher is considered pathologic.
The fatty degeneration is induced by cuff tears and is associated with functional impairment.
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