■体质静态肱骨后偏心(根据ABC分类的C1型)已被认为是骨关节炎前畸形,可能导致年轻时早期发作的后偏心骨关节炎。因此,确定这种病理性肩关节疾病的可能关联,以找到更有效的治疗方案是很重要的.
■要对报告与C1肩相关的所有参数进行全面分析-包括骨肩形态,肩胸方位,以及单个患者队列中肩带的肌肉体积。
■横断面研究;证据水平,3.
■回顾,进行了比较研究,分析了10例接受磁共振成像(MRI)的患者的17个C1肩,完整描绘了从颅底到the骨的躯干,包括两个humeri.患者的平均年龄为33.5岁,所有的病人都是男性.测量和比较骨肩形态(关节盂,关节盂偏移,肱骨扭转,肩峰前覆盖,后肩峰覆盖,肩峰后高度,和肩峰后倾斜)和肩胸定向(肩胛骨前移,肩胛骨内旋,肩胛骨向上旋转,肩胛骨翻译,肩胛骨倾斜,和胸椎后凸),这些患者根据他们的年龄匹配1到4,性别,以及接受正电子发射断层扫描(PET)计算机断层扫描的肩部健康患者的患侧。测量和比较肩带(肩胛骨下,冈底肌/小圆肌,冈上肌,斜方肌,三角肌,背阔肌/特雷斯专业,胸大肌,和胸小肌),1~2例患者与接受PET-MRI检查的患者相匹配.排除了上肢可见病变的患者。
■C1组的关节盂逆行明显增高,前关节盂偏移增加,肱骨后扭转减少,前肩峰覆盖率增加,后肩峰覆盖减少,后肩峰高度增加,与对照组相比,肩峰后倾角增加(P<0.05)。肱骨后扭转减少与较高的关节盂倒转(r=-0.742;P<.001)和较高的前关节盂偏移(r=-0.757;P<.001)显着相关。关于肩胛骨向上旋转较少,发现了显著差异,肩胛骨倾斜较少,C1组胸椎后凸畸形较少(P<0.05)。C1组的斜方肌和三角肌体积明显高于C1组(P<0.05)。
■C1肩患者在骨肩胛骨和肱骨形态方面与健康对照组不同,肩胸方位,和肩带肌肉分布。这些差异对于理解盂肱骨居中的微妙平衡可能至关重要。
UNASSIGNED: Constitutional static posterior humeral decentering (type C1 according to ABC Classification) has been recognized as a pre-osteoarthritic deformity that may lead to early-onset posterior decentering osteoarthritis at a young age. Therefore, it is important to identify possible associations of this pathologic shoulder condition to find more effective treatment options.
UNASSIGNED: To perform a comprehensive analysis of all parameters reported to be associated with a C1 shoulder-including the osseous shoulder morphology, scapulothoracic orientation, and the muscle volume of the shoulder girdle in a single patient cohort.
UNASSIGNED: Cross-sectional study; Level of evidence, 3.
UNASSIGNED: A retrospective, comparative study was conducted analyzing 17 C1 shoulders in 10 patients who underwent magnetic resonance imaging (MRI) with the complete depiction of the trunk from the base of the skull to the iliac crest, including both humeri. The mean age of the patients was 33.5 years, and all patients were men. To measure and compare the osseous shoulder morphology (glenoid version, glenoid offset, humeral torsion, anterior acromial coverage, posterior acromial coverage, posterior acromial height, and posterior acromial tilt) and scapulothoracic orientation (scapular protraction, scapular internal rotation, scapular upward rotation, scapular translation, scapular tilt, and thoracic kyphosis), these patients were matched 1 to 4 according their age, sex, and affected side with shoulder-healthy patients who had received positron emission tomography (PET)-computed tomography. To measure and compare the muscle volume of the shoulder girdle (subscapularis, infraspinatus/teres minor, supraspinatus, trapezius, deltoid, latissimus dorsi/teres major, pectoralis major, and pectoralis minor), patients were matched 1 to 2 with patients who had received PET-MRI. Patients with visible pathologies of the upper extremities were excluded.
UNASSIGNED: The C1 group had a significantly higher glenoid retroversion, increased anterior glenoid offset, reduced humeral retrotorsion, increased anterior acromial coverage, reduced posterior acromial coverage, increased posterior acromial height, and increased posterior acromial tilt compared with controls (P < .05). Decreased humeral retrotorsion showed significant correlation with higher glenoid retroversion (r = -0.742; P < .001) and higher anterior glenoid offset (r = -0.757; P < .001). Significant differences were found regarding less scapular upward rotation, less scapular tilt, and less thoracic kyphosis in the C1 group (P < .05). The muscle volume of the trapezius and deltoid was significantly higher in the C1 group (P < .05).
UNASSIGNED: Patients with C1 shoulders differ from healthy controls regarding osseous scapular and humeral morphology, scapulothoracic orientation, and shoulder girdle muscle distribution. These differences may be crucial in understanding the delicate balance of glenohumeral centering.