MRI 检查中男性肩袖无撕裂患者的肩袖肌肉横截面积
Cross-sectional areas of rotator cuff muscles in males without tears on shoulder MRI.
机构信息
Division of Musculoskeletal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Faculty of Medicine, University of Zurich, Zurich, Switzerland.
出版信息
Skeletal Radiol. 2024 Feb;53(2):285-291. doi: 10.1007/s00256-023-04400-w. Epub 2023 Jul 8.
OBJECTIVE
To establish reference values of rotator cuff (RC) cross sectional area (CSA) in males.
MATERIALS AND METHODS
We retrospectively analyzed shoulder MRIs from 500 patients aged 13-78 years, grouped as follows (N=100 in each): <20, 20-30, 30-40, 40-50, >50 years. All examinations were reviewed to exclude prior surgery, tears, or significant RC pathology. We segmented a standardized T1 sagittal MR image in each case to obtain CSA of supraspinatus (SUP), infraspinatus/teres minor (INF), and subscapularis (SUB) muscles. Across age groups, we recorded individual and total muscle CSA. We also performed ratios between individual muscle CSA and total CSA to examine total muscle mass contribution over age groups. We tested for differences between age groups controlled for BMI.
RESULTS
CSAs for SUP, INF, SUB, and total RC CSA were lower in subjects >50 years compared to all other groups (P<0.003 for all comparisons), persisting after controlling for BMI (P<0.03). Relative contribution of SUP CSA to total RC CSA was stable across age groups (P>0.32). INF CSA relative to total RC CSA increased with age, whereas SUB decreased (P<0.005). Subjects >50 years showed lower SUP (-15%), INF (-6%), and SUB (-21%) CSA, when compared to mean CSAs of all subjects <50 years. Total RC CSA significantly correlated with age (r=-0.34, P<0.001), persisting after controlling for BMI (r=-0.42, P<0.001).
CONCLUSION
RC muscles in male subjects with no tears on MRI show decreasing CSA with age, independent of BMI.
目的
建立男性肩袖（RC）横截面积（CSA）的参考值。
材料和方法
我们回顾性分析了 500 名年龄在 13-78 岁的患者的肩部 MRI，分为以下几组（每组 100 人）：<20 岁、20-30 岁、30-40 岁、40-50 岁、>50 岁。所有检查均排除了既往手术、撕裂或明显的 RC 病变。我们在每个病例中对标准化的 T1 矢状位 MRI 进行分割，以获得冈上肌（SUP）、冈下肌/小圆肌（INF）和肩胛下肌（SUB）的 CSA。在各个年龄组中，我们记录了单个和总肌肉 CSA。我们还进行了个体肌肉 CSA 与总 CSA 之间的比值，以检查随着年龄组的变化，总肌肉质量的贡献。我们在控制 BMI 的情况下测试了年龄组之间的差异。
结果
与所有其他组相比，>50 岁组的 SUP、INF、SUB 和总 RC CSA 较低（所有比较 P<0.003），在控制 BMI 后仍如此（P<0.03）。SUP CSA 占总 RC CSA 的比例在各年龄组之间保持稳定（P>0.32）。INF CSA 与总 RC CSA 的比值随年龄增加而增加，而 SUB 则减少（P<0.005）。与所有<50 岁患者的平均 CSA 相比，>50 岁组的 SUP（-15%）、INF（-6%）和 SUB（-21%）CSA 较低。总 RC CSA 与年龄显著相关（r=-0.34，P<0.001），在控制 BMI 后仍如此（r=-0.42，P<0.001）。
结论
在 MRI 上无撕裂的男性 RC 肌肉随年龄增长 CSA 逐渐减少，与 BMI 无关。
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