Of the 59 ankle fractures evaluated, 37 (63%) were classified as supination external rotation, 11 (19%) were pronation external rotation, 1 (2%) was supination adduction, and 10 (17%) were not classifiable on the basis of the Lauge-Hansen system. These were then compared to the actual injured structures on MRI in each case, and the ability of the Lauge-Hansen system to accurately predict the complete injury pattern was determined for the entire cohort.Īverage patient age was 59 (range: 18 to 84) years. ![]() MRI studies were subsequently read by an MRI musculoskeletal radiologist for the integrity of the ankle ligaments.Īfter evaluation of the x-rays, fractures were classified according to the system of Lauge-Hansen, and the predicted presence, sequence, and mechanism of injury was determined. All plain x-rays were assigned to a Lauge-Hansen category by an experienced orthopedic traumatologist. The purpose of this study was to evaluate the accuracy of these predicted injury sequences using magnetic resonance imaging (MRI) in a series of patients with ankle fractures.įifty-nine patients with operative ankle fractures who were evaluated with both x-ray and MRI were included.Īll patients had a standard 3-view ankle x-ray series before fracture reduction, followed by an MRI. The Lauge-Hansen classification system was designed to predict the mechanism and ligament injury patterns of ankle fractures on the basis of x-rays.
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