RT Book, Section A1 Amato, Anthony A. A1 Russell, James A. SR Print(0) ID 1115662003 T1 Mitochondrial Disorders T2 Neuromuscular Disorders, 2e YR 2015 FD 2015 PB McGraw-Hill Education PP New York, NY SN 9780071752503 LK neurology.mhmedical.com/content.aspx?aid=1115662003 RD 2023/01/28 AB Mitochondrial myopathies and neuropathies or neuromyopathies refer to a heterogeneous group of disorders caused by dysfunction of mitochondria.1–10 Mitochondrial disorders can be classified according to the associated biochemical, genetic defects, or clinical phenotype (Tables 30-1,30-2,30-3). One difficulty in classifying patients by any particular scheme is the clinical-phenotypic heterogeneity associated with specific mitochondrial mutations and the genetic heterogeneity in well-defined clinical phenotypes that are seen with mitochondrial disorders.