Mitochondrial Myopathy, Episodic, with or Without Optic Atrophy and Reversible Leukoencephalopathy, also known as mitochondrial myopathy, episodic, with optic atrophy and reversible leukoencephalopathy, is related to mitochondrial myopathy. An important gene associated with Mitochondrial Myopathy, Episodic, with or Without Optic Atrophy and Reversible Leukoencephalopathy is FDX2 (Ferredoxin 2). Affiliated tissues include skeletal muscle, and related phenotypes are spasticity and hyperreflexia