A pilot study to assess Fatty infiltration of the supraspinatus in patients with rotator cuff tears: comparison with magnetic resonance imaging

Ultrasound in Medicine & Biology
Tsuneo WatanabeMitsuru Seishima

Abstract

The aim of this study was to quantitatively assess the echo intensity of the supraspinatus muscle and compare magnetic resonance imaging and ultrasound findings for 27 patients (12 women, 15 men, 65.8 ± 11.5 y). Tear size and fatty infiltration were determined by magnetic resonance imaging; five stages were assigned based on Goutallier's classification. Gray-scale histogram analysis was used for ultrasound assessment, which was performed in both subcutaneous fat and supraspinatus muscle in three different regions; the echo intensity ratio was the ratio of echo intensity in subcutaneous fat to that in the supraspinatus muscle. Sonograms of 27 shoulders revealed 3 shoulders with a partial tear, and 4 with a small tear, 6 with a medium tear, 6 with a large tear and 4 with a massive tear; 4 shoulders had no tear. Supraspinatus muscle echo intensity and echo intensity ratio were significantly lower in the stage 0 and 1 than in stages 2-4. Our study suggests that ultrasound can quantitatively and objectively assess fatty infiltration in the rotator cuff muscle.

References

Apr 15, 2005·Investigative Radiology·Michiel A J van de SandePiet M Rozing
Mar 22, 2008·AJR. American Journal of Roentgenology·Viviane KhouryPaul Brassard
Jan 17, 2012·Journal of Shoulder and Elbow Surgery·Dominique LaronBrian T Feeley
Jul 1, 2010·Insights Into Imaging·Carlo Martinoli
Jan 29, 2013·Journal of Shoulder and Elbow Surgery·Gabriel J RulewiczMichael J Kissenberth

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Citations

Apr 9, 2017·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Tsuneo WatanabeMitsuru Seishima
Apr 11, 2019·JBJS Reviews·Troy N TenbrunselVani J Sabesan
May 4, 2021·Arthroscopy : the Journal of Arthroscopic & Related Surgery : Official Publication of the Arthroscopy Association of North America and the International Arthroscopy Association·Alejandro Pagán-ConesaFernando López-Prats

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