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Clin Shoulder Elbow > Volume 9(1); 2006 > Article
Journal of the Korean Shoulder and Elbow Society 2006;9(1):68-72.
DOI: https://doi.org/10.5397/CiSE.2006.9.1.068    Published online June 30, 2006.
Bilateral Shoulder Involvement with Mirror Image Lesion -An Arthroscopic Study in Overhead Workers
Young-Lae Moon, M. D., Chul-Gab Lee, M.D.*, Jong-Sik Kim, M.D.* *
Department of Orthopedic Surgery, Chosun University, Gwangju, Korea. Department of Occupational and Environment, Chosun University, Gwangju, Korea.* Department of Orthopedic Surgery, Seonam University, Gwangju, Korea.**
양측 견관절을 침범한 거울 병변 -머리 위의 작업을 하는 근로자 대상 관절경적 연구
조선대학교병원 정형외과학교실, 조선대학교병원 산업의학과교실*
서남대학교병원 정형외과학교실**
To demonstrate arthroscopically the presence of bilateral shoulder “mirror lesions”due to overhead work Materials and Methods: A cross-sectional study was performed in a historical cohort of 10 male tire plant workers who underwent MRI studies of both shoulders. Bilateral intraarticular shoulder pathology was diagnosed by magnetic resonance imaging and confirmed by arthroscopy. “Mirror lesions”were defined as similar pathology between an individual patient’s two shoulders. Results: We report on ten patients who had bilateral “mirror lesions.”The most common mirror lesions were tears of the rotator cuff. Most patients (7 of 10) had more than one mirror lesion in their shoulders. There were two bilateral full thickness tears involving the supraspinatus and infraspinatus, four bilateral partial thickness supraspinatus tears, six bilateral partial or upper corner lesion complete subscapularis tears, and one bilateral complete supraspinatus tear. Conclusion: Occupational overhead work with simultaneous use of both arms is associated with bilateral shoulder lesions verified by arthroscopy. By demonstrating the work-related bilateral shoulder involvement, this study suggests an etiopathogenesis for these lesions and provides rational for developing worksite prevention strategies.
Key Words: Shoulder, Overhead worker, Bilateral, Mirror lesion
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