chronic progressive external ophthalmoplegia

Mitochondria are intracellolar organelles that play important roles in energy-producing and organismal survival via oxidative phosphorylation. The defection of this system leads to mitochondrial dysfunction and mitochondrial myopathies. The usual ocolar motor presentation is a chronic, symmetrical, and diffuse weakness of extraocolar muscle. We described a 50-year-old woman of Kearns-Sayre syndrome (KSS) ...