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MRI study of changes in knee bone marrow edema-like signal in asymptomatic amateur marathon runners before and after half-marathon running

  • Author Footnotes
    1 Departments of Radiology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, 310015, China.
    Yi Zhang
    Footnotes
    1 Departments of Radiology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, 310015, China.
    Affiliations
    Department of Radiology, The Affiliated Hospital of Hangzhou Normal University, No. 126, Wenzhou Road, Gongshu District, Hangzhou 310000, Zhejiang, China
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  • Dingbo Shu
    Affiliations
    Department of Radiology, The Affiliated Hospital of Hangzhou Normal University, No. 126, Wenzhou Road, Gongshu District, Hangzhou 310000, Zhejiang, China
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  • Wanzhen Yao
    Affiliations
    Department of Radiology, The Affiliated Hospital of Hangzhou Normal University, No. 126, Wenzhou Road, Gongshu District, Hangzhou 310000, Zhejiang, China
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  • Jianping Ding
    Correspondence
    Corresponding author at: Departments of Radiology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou 310015, China.
    Affiliations
    Department of Radiology, The Affiliated Hospital of Hangzhou Normal University, No. 126, Wenzhou Road, Gongshu District, Hangzhou 310000, Zhejiang, China
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  • Leilei Chen
    Affiliations
    Department of Radiology, The Affiliated Hospital of Hangzhou Normal University, No. 126, Wenzhou Road, Gongshu District, Hangzhou 310000, Zhejiang, China
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  • Xiaoying Lin
    Affiliations
    Department of Radiology, The Affiliated Hospital of Hangzhou Normal University, No. 126, Wenzhou Road, Gongshu District, Hangzhou 310000, Zhejiang, China
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  • Tian Tian
    Affiliations
    Department of Radiology, The Affiliated Hospital of Hangzhou Normal University, No. 126, Wenzhou Road, Gongshu District, Hangzhou 310000, Zhejiang, China
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  • Jie Liu
    Affiliations
    Department of Radiology, The Affiliated Hospital of Hangzhou Normal University, No. 126, Wenzhou Road, Gongshu District, Hangzhou 310000, Zhejiang, China
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  • Author Footnotes
    1 Departments of Radiology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, 310015, China.

      Highlights

      • The occurrence of knee bone marrow edema-like signal in amateur marathon runners is more common.
      • After the half marathon, grades of knee bone marrow edema-like signal showed no significant difference in marathon runners.
      • The lesions showed aggravation or improvement in a certain extent after the half marathon.

      Abstract

      Objective

      To evaluate the incidence of knee bone marrow edema-like signal and its changes before and after running a half marathon running in asymptomatic amateur marathon runners to explore the impact of the half marathon on knee bone marrow edema-like signal.

      Methods

      50 asymptomatic amateur marathon runners (30 males, 20 females) were recruited. T1-weighted imaging (T1WI), fat-suppressed protein density weighted imaging (fs-PDWI) and three-dimensional double-echo steady-state (3D-DESS) sequence on the right knee were performed before and within 3 h after a half-marathon running. 20 healthy volunteers were recruited as control. According to the whole-organ magnetic resonance imaging score (WORMS) system, the involvement of bone marrow edema-like signal in 15 regions of knee was graded from 0 to 3. The results were classified and Mann Whitney U test was used for comparison between groups.

      Results

      The total incidence of bone marrow edema-like signal in amateur marathon group was 62%. Among them, the incidence of grade 1–3 was 48% (24/50), 12% (6/50), 2% (1/50), respectively, which was statistically significant compared with the controls (P = 0.007). There was no significant difference between gender before running (P = 0.172) and after running (P = 0.162). There was no significant difference before and after running (P > 0.05). However, 3 subjects showed new lesions, 8 subjects showed progression and 4 subjects showed decreased signal.

      Conclusion

      The occurrence of knee bone marrow edema-like signal in amateur marathon runners is more common. The lesions of bone marrow edema-like signal will show aggravation or improvement in a certain extent after the half marathon.

      Keywords

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