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KMID : 1207720100020040237
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Clinics in Orthopedic Surgery
2010 Volume.2 No. 4 p.237 ~ p.243
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Reliability of MRI Findings of Peroneal Tendinopathy in Patients with Lateral Chronic Ankle Instability
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Park Hee-Jin
Cha Seung-Doh
Kim Hyoung-Soo
Chung Soo-Tae
Park Noh-Hyuck
Yoo Jeong-Hyun
Park Jai-Hyung
Kim Joo-Hak
Lee Tae-Woo
Lee Chang-Hyun
Oh Se-Man
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Abstract
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Background: Patients with chronic lateral ankle instability also have peroneal tendinopathy often. However, preoperative MRIs of these patients are vague in many cases. Our study was performed to see the reliability of MRI findings of peroneal tendinopathy in patients with chronic lateral ankle instability.
Methods: MRI images for 82 patients who had chronic lateral ankle instability, and had received surgical treatment between March 2006 and November 2009 were compared with impressions from operating rooms. The mean age of patients was 36.4 years (range, 15 to 64 years), 82 ankles were studied, and patients with rheumatoid diseases were excluded from the study.
Results: Of the 82 cases, 26 were true positives, 38 true negatives, 13 false positives and 5 false negatives. Of 39 cases of peroneal tendinopathy diagnosed from MRI, 14 had peroneal tendon partial tears, 15 tenosynovitis, 3 dislocations, 17 low-lying muscle bellies, and 6 peroneus quartus muscles. Of 31 cases of peroneal tendinopathy observed in surgery 11 had peroneal tendon partial tears, 4 tenosynovitis, 5 dislocations, 12 low-lying muscle belliess, and 1 peroneus quartus muscle. Sensitivity and specificity of peroneal tendinopathy were 83.9% and 74.5%, respectively. Positive predictive value was 66.7%. Negative predictive value was 88.4%. Accuracy rate was 78.0%.
Conclusions: MRI is a useful diagnostic tool for detecting peroneal tendinopathy in patients with chronic lateral ankle instability. However, MRI is vague in many cases. Therefore, a thorough delicate physical examination and careful observation is needed.
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KEYWORD
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Peroneal tendinopathy, Chronic lateral ankle instability, MRI
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