MR arthrogram for shoulder microinstability and hidden lesions

Shoulder joint pain due to anterior microinstability is not an unusual complaint of young active individuals. Different etiologies of such shoulder microinstability are encountered, mainly affecting the anterior–inferior labro-ligamentous capsular structures. These injuries include Perthes lesion, ALPSA, GLAD, RIT, SLAP and glenohumeral ligamentous injuries. The aim of this study: The aim of this study is to enhance the role of MR arthrogram over routine MRI in the diagnosis of such subtle lesions. Patients and methods: This is a prospective study, involving 30 consecutive patients of shoulder microinstability complaints, evaluated by MR arthrogram of the affected shoulder. Results: Perthes lesions were diagnosed in 6 patients, ALPSA in 3 patients, GLAD in 2 patients, RIT in 2 patients and SLAP in 11 patients. Ligamentous injuries that include tear of MGHL, were found in 2 patients and IGHL in 4 patients. Conclusion: MR arthrogram is highly recommended for the management of young patients with shoulder microinstability or unexplained painful movement complaints.