Journal
JOURNAL OF SHOULDER AND ELBOW SURGERY
Volume 15, Issue 1, Pages 56-59Publisher
MOSBY, INC
DOI: 10.1016/j.jse.2005.05.013
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The purpose of this study was to compare acromioclavicular (AC) joint magnetic resonance imaging (MRI) findings in asymptomatic patients with those in symptomatic patients. The MRI scans of 25 patients with symptomatic AC joints were compared with 50 asymptomatic control subjects by use of the some grading scale. In the symptomatic group, AC joint arthritis grading was normal in 0%, mild in 20%, moderate in 52%, and severe in 28%. In the asymptomatic group, grading was normal in 18%, mild in 66%, moderate in 12%, and severe in 4%; there was a statistically higher grade of AC arthritis in the symptomatic group (P < .05). Of the symptomatic individuals, 80% demonstrated reactive bone edema in either the distal clav-icle (6), the acromion (3), or both sides of the AC joint (11), whereas no individual in the asymptomatic group had this finding (P < .05). Reactive bone edema on MRI is a more reliable predictor of symptomatic AC pathology than degenerative changes seen on MRI and, when correlated with clinical examination, is re-producible.
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