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Ultrasound Examination for the Diagnosis of Chronic Anterior Talofibular Ligament Injury

Background Anterior talofibular ligament (ATFL) injury is a commonly seen sports-related injury and a major underlying pathology of chronic ankle instability. However, it is difficult to accurately identify chronic injury of the ATFL. Purpose To investigate the value of ultrasound (US) examination in identifying chronic ATFL injury. Material and Methods We evaluated 83 consecutive patients who underwent US examination for diagnosis of the ATFL injury and subsequent ankle arthroscopy. The arthroscopic findings were used as the reference standard. Results Forty-four patients were found to have ATFL injury on arthroscopy. The accuracy of US examination for the detection of ATFL injury was 95.2%, with sensitivity of 97.7%, specificity of 92.3%, positive predictive value of 93.5%, negative predictive value of 97.3%, positive likelihood ratio of 12.7, and negative likelihood ratio of 0.025. Conclusion US examination is a reliable and accurate method to evaluate chronic ATFL injury.