LaBan M M, Gurin T L, Maltese J T
Department of Physical Medicine and Rehabilitation, William Beaumont Hospital, Royal Oak, Michigan 48073, USA.
Am J Phys Med Rehabil. 1995 Nov-Dec;74(6):448-52. doi: 10.1097/00002060-199511000-00011.
The shoulder's unique wide range of motion is largely restrained by the articular capsule and the external ligaments of the glenohumeral joint. Internally, the long head of the biceps tendon passes within the capsule and inserts on the superior lip of the glenoid labrum. Trauma distracting this tendon can tear the superior glenoid labrum, producing the superior labrum anterior to posterior (SLAP) syndrome. Four patients, two of whom were female, presented with complaints of acute shoulder pain associated with weakness in abduction and forward flexion. Routine shoulder roentgenograms were normal. Magnetic resonance imaging (MRI) studies revealed a superior glenoid labral tear consistent with a SLAP syndrome. The superior labrum, unlike the firmly bound inferior portion, is loosely attached to the glenoid fossa. This inherent mobility predisposes it to disruption. To routine ultrasonography and arthrogram, the superior labrum may be obscured by superimposed structures. Shoulder arthroscopy, computed tomography, arthrography, and MRI have relatively equal sensitivity in visualizing these labral tears. The SLAP lesion accompanies 16% of all rotator cuff tears, occurring more often than heretofore recognized. When clinically suspected, they can be readily visualized by a noninvasive MRI examination.
肩部独特的广泛活动范围在很大程度上受到关节囊和盂肱关节外部韧带的限制。在内部，肱二头肌长头肌腱穿过关节囊并附着于肩胛盂唇的上缘。使该肌腱移位的创伤可撕裂肩胛盂上唇，导致上盂唇从前到后（SLAP）综合征。4例患者，其中2例为女性，主诉急性肩部疼痛并伴有外展和前屈无力。常规肩部X线片正常。磁共振成像（MRI）研究显示肩胛盂上唇撕裂，符合SLAP综合征。上盂唇与牢固附着的下部分不同，它松散地附着于肩胛盂窝。这种固有的活动度使其易于发生断裂。对于常规超声检查和关节造影，上盂唇可能会被重叠结构遮挡。肩关节镜检查、计算机断层扫描、关节造影和MRI在显示这些盂唇撕裂方面具有相对相同的敏感性。SLAP损伤在所有肩袖撕裂中占16%，其发生率比以往认识的更高。当临床怀疑时，通过无创MRI检查可很容易地显示出来。
