IMAGING ROADMAP TO ASSESS GLENOID LABRUM ON MRI

Abstract

Purpose or Learning Objectives: To describe ideal imaging technique and sequences for MRI shoulder.To describe roadmap for assessment of glenoid labrum and labral pathologies.To explain associated findings with labral injury.

Background: MRI is the modality of choice to assess internal derangements in shoulder joint. Labrum is attached to the glenoid margin and gives depth to the glenoid cavity. Labral injuries are common following trauma to shoulder joint. A roadmap should be in place to stepwise assess the labrum, its normal characteristics, its variations and tears. In this educational poster, we aim to emphasize ideal steps in reaching the final diagnosis of labral pathology without need of MR Arthrogram.

Findings:  MRI Shoulder is ideally performed in three planes. The coronal and sagittal planes are obtained obliquely due to joint's oblique orientation. Ideal sequences are PD and PD FATSAT in all three planes. Labral injury is associated with periosteal stripping, chondral injury, bone injury, torn glenohumeral ligament or even ruptured capsule.

Conclusion: MRI is essential in diagnosing labral injuries and knowledge of approach to MRI can help reach final diagnosis without arthrogram.

Keywords:  Musculoskeletal joint, MR, Diagnostic procedure, Trauma