SLAP tear



SLAP tear

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A SLAP tear or SLAP lesion is an injury to the Glenoid labrum (fibrocartilaginous rim attached around the margin of the glenoid cavity). SLAP is an acronym that stands for "Superior Labral tear from Anterior to Posterior".


The shoulder joint is considered a 'ball and socket' joint. However, in bony terms the 'socket' (the glenoid fossa of the scapula) is quite small, covering at most only a third of the 'ball' (the head of the humerus). The socket is somewhat deepened by a circumferential rim of fibrocartilage which is called the glenoidal labrum. Previously there was some argument as to the structure (it is fibrocartilaginous as opposed to the hyaline cartilage found in the remainder of the glenoid fossa) and function (it was considered a redundant evolutionary remnant, but is now considered integral to shoulder stability). Most authorities agree that the tendon of the long head of the biceps brachii muscle proximally becomes fibrocartilaginous prior to attaching to the superior aspect of the glenoid. Similarly the long head of the triceps brachii inserts inferiorly. Together these cartilaginous extensions of the tendon are termed the 'glenoid labrum'. A SLAP tear or lesion occurs when there is damage to the superior or uppermost area of the labrum.SLAP lesions have come into public awareness with their increasing...
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