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30 November 2019 : Clinical Research  

Adolescent Hyperuricemia with Lipid Storage Myopathy: A Clinical Study

Jingzhe Han1ABEF, Xueqin Song234AFG*, Shan Lu2CD, Guang Ji2DF, Yanan Xie5ACD, Hongran Wu234CD

DOI: 10.12659/MSM.918841

Med Sci Monit 2019; 25:9103-9111

Abstract

BACKGROUND: In this study, we investigated the clinical and pathological features of patients with lipid storage myopathy (LSM) complicated with hyperuricemia, to improve clinicians’ understanding of metabolic multi-muscular disorder with metabolic disorders, and to reduce the risk of missed diagnosis of LSM.

MATERIAL AND METHODS: From January 2005 to December 2017, 8 patients underwent muscle biopsy and diagnosed by muscle pathology and genetic testing in our hospital. All 8 patients were in compliance with LSM diagnosis. We collected data on the patient’s clinical performance, adjuvant examination, treatment, and outcomes to provide a comprehensive report and description of LSM patients with hyperuricemia.

RESULTS: All patients were diagnosed as having ETFDH gene mutations. The main clinical manifestations of patients were chronic limb and trunk weakness, limb numbness, and muscle pain. The serum creatine kinase (CK) values in all patients were higher than normal values. Electromyography showed 3 cases of simple myogenic damage and 3 cases of neurogenic injury. Hematuria metabolic screening showed that 2 patients had elevated glutaric aciduria, and 1 patient had elevated fatty acyl carnitine in the blood. All patients were given riboflavin treatment, and the clinical symptoms were significantly improved, and 3 patients returned to normal uric acid levels after treatment. Pathological staining showed an abnormal deposition of lipid droplets in muscle fibers.

CONCLUSIONS: If an adolescent hyperuricemia patient has abnormal limb weakness, exercise intolerance, and elevated serum CK values, clinicians need to be highly alert to the possibility of LSM. Early diagnosis and treatment of LSM should improve the clinical symptoms and quality of life and reduce complications.

Keywords: Adolescent, hyperuricemia, Lipid Metabolism, carnitine, Child, Electron-Transferring Flavoproteins, Iron-Sulfur Proteins, Lipid Metabolism, Inborn Errors, Muscle Weakness, Muscle, Skeletal, Muscular Diseases, Muscular Dystrophies, Oxidoreductases Acting on CH-NH Group Donors, Quality of Life, Riboflavin, young adult

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750