6 天之前 · MRI. The clue to identifying an ALPSA lesion is the medial displacement and inferior shifting of the inferior glenohumeral ligament (IGHL) complex. A Hill-Sachs defect may be seen in association. MR arthrography. May show contrast material entering a cleft between the anteroinferior glenoid and the labrum.

On T1-weighted MRI images, an Anterior Labral Periosteal Sleeve Avulsion (ALPSA) lesion may appear as a discontinuity or irregularity in the normal contour of the anterior labrum. The lesion itself may exhibit an intermediate to low signal intensity compared to the surrounding structures.

There are two types of labral tears: SLAP tears and Bankart lesions. SLAP is an acronym that stands for 'Superior Labral tear from Anterior to Posterior'. SLAP tears start at the 12 o'clock position where the biceps anchor is located, which tears the labrum off the glenoid.

In this article, we will concentrate on routine magnetic resonance (MR) imaging and MR arthrographic evaluation of the athletic shoulder. Abnormalities of the labroligamentous complex and the more recently described impingement syndromes that often accompany them, as well as nerve entrapment syndromes, will be reviewed.

Anterior labroligamentous periosteal sleeve avulsion (ALPSA) lesion occurs following anterior shoulder dislocation. There is medial displacement and inferior shift of the IGHL complex with …

2024年8月23日 · Anterior labrum periosteal sleeve avulsion (ALPSA) lesion of the shoulder is defined as a labral avulsion with an intact periosteum of the glenoid neck resulting in medial malattachment of the labrum, which is both nonanatomic and nonfunctional.

2025年3月28日 · * Definition and pathophysiology of the ALPSA lesion and how it occurs. * Description of the ALPSA lesion at arthroscopy and the role of MRI in guiding the arthroscopist. * Review of imaging findings with both routine MRI and MR arthrography. * Representative cases that demonstrate ALPSA lesions on both routine and arthrographic MR.

Anterior labroligamentous periosteal sleeve avulsions represent a diagnostic and treatment challenge. They are associated with a higher number of preoperative dislocations, as well as longer chronicity, and commonly result in a scarred …

2025年2月8日 · MRI. The clue to identifying an ALPSA lesion is the medial displacement and inferior shifting of the inferior glenohumeral ligament (IGHL) complex. A Hill-Sachs defect may be seen in association. MR arthrography. May show contrast material entering a cleft between the anteroinferior glenoid and the labrum.

ALPSA lesion on the left and MR-Arthrogram on the right showing an ALPSA lesion (arrows): ALPSA seen at arthroscopy. On the left the anterior glenoid labrum is abscent. On the right the scope is in the anterosuperior portal and the labrum can be seen to be displaced and healed medially on the glenoid neck: Reference: Nevasier. Arthroscopy. 1993.