Purpose : Chronic ankle pain is one of the most popular problems with orthopedic clinicians, but it has complex etiologic factors in diagnosis. Recently, magnetic resornance imaging has used as common diagnostic modality in ligaments and tendon problems of ankle sprain. The purpose of this article is to determine the appearances and frequency of chronic ankle sprain by MRI, and to determine the value of MRI as a diagnostic tool.
Materials and Methods : We have analysed MRI findings of 84 chronic sprained ankles over 6 months duration from September 1995 to January 1997. All cases had been past history of ankle injury. Among them, sports players ie, soccer, basket ball, competitive runner and ballet dancer are 51 cases( 60.7% ). Average age of patients is 27.06( 13 to 54 ) years old and sex ratio is 23:5. For the confirmative diagnosis, We adopted variable methods, ie, ultrasonogram, bone scan, CT scan, arthroscopic examination and surgical intervention.
Results : The Etiologic factors of chronic ankle sprain by MRI includes 39 Lateral ankle instability due to Anterior Talofibular and Calcaneofibular ligamentous tear, 18 Peroneal tendon insufficiency ie, synovitis, longitudinal tear, subluxation and abnormal tendon insertion, 15 Osteochondral fracture of talus or tibia, 10 Anterior Impingement syndrome due to anterior bony spur, 9 Deltoid tear, 6 Os subfibulare, 4 Distal tibiofibular ligament abnormality, 3 Os subtibiale, 2 Ankle synovitis, 2 Intraarticular loose body.
Conclusion : MRI study employed in hazy chronic ankle sprain is useful diagnostic modality. But, Diagnostic result using MRI was not correlated the clinical prognosis, and proper physical examination is important in the point of technical aspect to get the exact dissecting angle of MRI.
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