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KMID : 0359420060240020180
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Korean Journal of Sports Medicine
2006 Volume.24 No. 2 p.180 ~ p.185
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The Characteristics of Femoral Diaphyseal Stress Fractures in Runners
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Jang Ki-Un
Michael Fredericson
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Abstract
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The purpose of this study is to evaluate femoral diaphyseal stress injuries in runners and to document the results of demographic, physical examination and systematic grading system based on magnetic resonance imaging (MRI) and bone scan. A retrospective review of medical records and radiologic findings on patients were surveyed at Stanford Sports Clinic. Twenty-five track and field varsity team members and recreational runners were subsequently diagnosed with 31 femoral diaphyseal stress injuries. The location of injury of 31 femoral diaphyseal stress fracture included the proximal femur in 18 (58.1%), the midfemur in 11 (35.5%), and the distal femur in 2 legs(6.5%). MRI grading revealed grade I in 2 of 16 (12.5%), grade II in 7 of 16 (43.8%), and grade III in 7 of 16 (43.8%) runners. Bone scan grading was also evaluated. There was close correlation between grade of MRI and scintigraphy in the 12 athletes who had both exams, with 91.7% coincidence. These data showed that women were more frequently affected than men and nearly half of these injuries occurred in freshmen collegiate runners. If routine radiographs are negative, a bone scan or MRI with fat-suppression technique can be used to detect and grade bony changes in the femoral diaphyses and to help plan an appropriate rehabilitation program.
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KEYWORD
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Stress fracture, Femur, Running, Bone scan, MRI
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