Aktas A.Tasdemir M.S.Tasdemir N.Nergiz Y.2024-04-242024-04-2420101309-100Xhttps://hdl.handle.net/11468/24611Kearns-Sayre syndrome is a mitochondrial disease, presenting findings before the age of 20 and characterized by chronic progressive external ophthalmoplegia and pigmentary retinal degeneration. It affects many organs, resulting in a very wide spectrum of complications. In this work, a 24-year-old female, whose complaints first started at the age of 12, showing progressing external ophthalmoplegia and diagnosed with Kearns-Sayre disease following mitochondrial changes in muscle electron microscope investigation was presented. Ways of diagnosing in mitochondrial diseases, especially those in children were tried to be evaluated.eninfo:eu-repo/semantics/closedAccessElectron MicroscopeKearns-Sayre SyndromeMitochondrial DiseasesProgressive External OphthalmoplegiaProgressive external ophthalmoplegia (PEO): Presentation of a mitochondrial myopathy accompanied by electron microscopeProgressive external ophthalmoplegia (PEO): Presentation of a mitochondrial myopathy accompanied by electron microscopeArticle331541572-s2.0-80051586463Q3