MRI EVALUATION OF SHOULDER JOINT PATHOLOGIES
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Keywords
Magnetic Resonance Imaging, rotator cuff injury, glenohumeral instability
Abstract
Background: Shoulder pain is one of the most common complaint in the medical practice and often leads to significant disabilities. The prevalence of shoulder pain has been reported to range from 7% to 14% of the overall population.
Objective: To evaluate the role of Magnetic Resonance Imaging in clinically suspected cases of rotator cuff injury and glenohumeral instability.
Methods: The present study was carried out on 30 patients presenting with shoulder pain clinically suspected with either rotator cuff pathology or glenohumeral instability.
Results: Trauma was the etiology in 63% of the cases. Most common acromion type was type I acromion process (63%). Most common type of acromion causing subacromial impingement was type III acromion process. Acromioclavicular joint hypertrophy was noted in 10% of cases. Out of 30 cases studied, Rotator cuff pathologies were found in 60% (18) of patients. MRI was 85% sensitive, 94% specific and 90% accurate in diagnosing all (partial and full thickness) rotator cuff tears. Glenohumeral instability lesions were found in 57% (17) of patients. Bankart lesion was the most common lesion associated with glenohumeral instability, accounting to 50% of cases. Hill-Sachs lesion was seen in 40% and SLAP lesion in 6% of cases. MRI has higher sensitivity for detection of bony Bankart lesion than labral bankart lesion. The sensitivity, specificity and accuracy of MRI for the diagnosis of Hill-Sachs lesion were 100%, 89% and 93% respectively. All the patients with Hill-Sachs lesion had either an associated Bankart lesion or its variant.
Conclusions: MRI can be considered almost equally effective as compared to arthroscopy in the evaluation of shoulder pathologies.
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Kancherlapalli Divya Rani
Assistant Professor, Department of Radiodiagnosis, Government medical College Mahabubnagar, Telangana
Padala Mohan Kumar
Assistant Professor, Department of Orthopaedics, Government Medical College, Sangareddy, Telangana.
Edura Praveena
Senior Resident, Dept of Pathology, ESIC Sanathnagar, Hyderabad
P Mamatha
Assistant Professor, Department of Radiodiagnosis, Government Medical College, Madanapalle, Annamayya dt Andhrapradesh