the following syndromes are described : chronic progressive external ophthalmoplegia ( cpeo ) , kearns-sayre syndrome ( kss ) , merrf syndrome ( myoclonic epilepsy with ragged-red fibers ) , melas syndrome ( mitochondrial myopathy , encephalopathy , lactic acidosis , stroke-like episodes ) and leigh and alpers syndromes .
C0162674
chronic progressive external ophthalmoplegia
C0162670
mitochondrial myopathy