Cervilla V, Schweitzer M E, Ho C, Motta A, Kerr R, Resnick D
Department of Radiology, Veterans Administration Medical Center, San Diego, CA 92161.
Radiology. 1991 Aug;180(2):523-6. doi: 10.1148/radiology.180.2.2068322.
Abnormalities of the long tendon of the biceps brachii muscle commonly accompany other lesions about the shoulder, especially rotator cuff rupture, and are a frequent cause of a painful shoulder. The spectrum of abnormalities associated with medial displacement of the biceps tendon seen at magnetic resonance (MR) imaging was reviewed in six patients. MR imaging was performed on a 1.5-T system with use of a dedicated surface coil. The findings at MR imaging were correlated with those at surgery. Two types of medial displacement of the biceps tendon were identified. More frequently observed was a defect in the subscapularis apparatus that allowed intraarticular entrapment of the biceps tendon. Less commonly observed was incomplete dislocation, with the biceps tendon lying between a partially disrupted subscapularis tendon. MR imaging enabled accurate identification of medial dislocation of the biceps tendon and entrapment of the tendon within the glenohumeral joint. MR imaging also demonstrated the associated disruption of the subscapularis tendon that must be present to allow the biceps tendon access to the joint space.
肱二头肌长头肌腱异常通常伴随肩部的其他病变，尤其是肩袖撕裂，并且是肩部疼痛的常见原因。我们回顾了6例在磁共振成像（MR）中观察到的与肱二头肌肌腱内侧移位相关的异常情况。使用专用表面线圈在1.5-T系统上进行MR成像。MR成像结果与手术结果相关。确定了两种类型的肱二头肌肌腱内侧移位。更常见的是肩胛下肌装置存在缺陷，导致肱二头肌肌腱在关节内被卡压。较少见的是不完全脱位，肱二头肌肌腱位于部分断裂的肩胛下肌腱之间。MR成像能够准确识别肱二头肌肌腱的内侧脱位以及肌腱在盂肱关节内的卡压。MR成像还显示了肩胛下肌腱的相关断裂，这是肱二头肌肌腱进入关节间隙所必需的。
