Anterior labroligamentous periosteal sleeve avulsion lesion
An anterior labroligamentous periosteal sleeve avulsion (ALPSA) lesion is similar to a Bankart lesion, in that it too is usually due to anterior shoulder dislocation, and involves the anterior inferior labrum.
Unlike the Bankart lesion in which the labrum is avulsed from the underlying glenoid, in an ALPSA lesion the mobilised labrum remains attached to the periosteum which overlies the glenoid (thus sleeve). As a result it can heal (as opposed to Bankart which do not), however it can do so in an abnormal position requiring identification and early surgical repair.
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- 2. Song HT, Huh YM, Kim S et-al. The usefulness of virtual MR arthroscopy as an adjunct to conventional MR arthrography in detecting anterior labral lesions of the shoulder. AJR Am J Roentgenol. 2009;192 (4): W149-55. doi:10.2214/AJR.07.2312 - Pubmed citation
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