Alilet Mona, Behr Julien, Nueffer Jean-Philippe, Barbier-Brion Benoit, Aubry Sébastien
Department of Musculoskeletal Imaging, CHRU de Besançon, CHRU Jean Minjoz, Boulevard Fleming, 25030, Besançon Cedex, France.
Anatomy Laboratory, University of Franche-Comte, Besançon, France.
Insights Imaging. 2016 Dec;7(6):779-791. doi: 10.1007/s13244-016-0526-1. Epub 2016 Oct 17.
UNLABELLED: The subscapularis (SSC) muscle is the most powerful of the rotator cuff muscles, and plays an important role in shoulder motion and stabilization. SSC tendon tear is quite uncommon, compared to the supraspinatus (SSP) tendon, and, most of the time, part of a large rupture of the rotator cuff. Various complementary imaging techniques can be used to obtain an accurate diagnosis of SSC tendon lesions, as well as their extension and muscular impact. Pre-operative diagnosis by imaging is a key issue, since a lesion of the SSC tendon impacts on treatment, surgical approach, and post-operative functional prognosis of rotator cuff injuries. Radiologists should be aware of the SSC anatomy, variability in radiological presentation of muscle or tendon injury, and particular mechanisms that may lead to a SSC injury, such as coracoid impingement. TEACHING POINTS: • Isolated subscapularis (SSC) tendon tears are uncommon. • Classically, partial thickness SSC tendon tears start superomedially and progress inferolaterally. • Long head of biceps tendon medial dislocation can indirectly signify SSC tendon tears. • SSC tendon injury is associated with anterior shoulder instability. • Dynamic ultrasound study of the SSC helps to diagnose coracoid impingement.
未标注:肩胛下肌(SSC)是肩袖肌群中最有力的肌肉,在肩部运动和稳定中起重要作用。与冈上肌(SSP)肌腱相比,SSC肌腱撕裂相当少见,并且在大多数情况下,是肩袖大破裂的一部分。各种辅助成像技术可用于准确诊断SSC肌腱损伤及其范围和对肌肉的影响。术前通过成像进行诊断是一个关键问题,因为SSC肌腱损伤会影响肩袖损伤的治疗、手术入路和术后功能预后。放射科医生应了解SSC的解剖结构、肌肉或肌腱损伤的放射学表现的变异性以及可能导致SSC损伤的特殊机制,如喙突撞击。 教学要点:•孤立的肩胛下肌(SSC)肌腱撕裂并不常见。•典型的SSC肌腱部分厚度撕裂始于上内侧并向外侧下方发展。•肱二头肌长头肌腱内侧脱位可间接提示SSC肌腱撕裂。•SSC肌腱损伤与肩关节前不稳定有关。•对SSC进行动态超声检查有助于诊断喙突撞击。
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