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http://dx.doi.org/10.5397/cise.2019.22.1.3

The Volume of Subscapularis Muscle Remains Unaffected by Supraspinatus Tendon Tears: Three-dimensionally Reconstructed Magnetic Resonance Imaging Analysis  

Jun, Yong Cheol (Department of Orthopedic Surgery, Chosun University School of Medicine)
Moon, Young Lae (Department of Orthopedic Surgery, Chosun University School of Medicine)
Bhardwaj, Havinder Dev (Department of Orthopedic Surgery, Punjab Institute of Medical Sciences)
Lim, Jae Hwan (Department of Orthopedic Surgery, Chosun University School of Medicine)
Cha, Dong Hyuk (Department of Orthopedic Surgery, Chosun University School of Medicine)
Publication Information
Clinics in Shoulder and Elbow / v.22, no.1, 2019 , pp. 3-8 More about this Journal
Abstract
Background: This study aimed to compare the subscapularis muscle volume between the intact groups (group I) and supraspinatus tendon tear groups (group T) based on the sex and three different age groups. Methods: Subjects with a group I and subjects with group T without any other lesions were retrospectively evaluated from among patients who received a magnetic resonance imaging (MRI) scan between January 2011 and December 2013. The MRI scans were studied by a consultant radiologist. The subscapularis muscle volume was compared according to the age and sex; the age groups were categorized as patients in their 40s, 50s, and 60s. The volume of subscapularis muscle was measured by three-dimensional reconstructed images acquired through the axial section of 1.5T MRI. Results: No statistically significant differences were observed between subscapularis muscle volume of the group I and group T, except for male patients in their 50s (group I: $100,650mm^3$ vs. group T: $106,488mm^3$) and 60s (group I: $76,347mm^3$ vs. group T: $99,549mm^3$) (p<0.05). Males had a larger mean volume of subscapularis muscle than females, and the subscapularis muscle volume decreased in a linear manner with increasing age. Conclusions: Decrease in subscapularis muscle volume was observed with increasing age, and the impact of supraspinatus tear on subscapularis muscle volume is age and sex dependent.
Keywords
Rotator cuff tear; Muscle atrophy; Quantitative assessment;
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