Muscle pathology of patient 6. Basophilic fibers on H & E staining (arrow) (a), RRFs on MGT staining (arrow) (b), and RBFs on SDH staining (arrows) (c and d). RRF: Ragged-red fiber; MGT: Modified Gomori trichrome; RBF: Ragged-blue fiber; SDH: Succinate dehydrogenase; KSS: Kearns-Sayre syndrome. Clinical and Brain Magnetic Resonance Imaging Features in a Cohort of Chinese Patients with Kearns-Sayre Syndrome: Yu M, Zhang Z, Wang QQ, Liu J, Zuo YH, Yu L, Xiao JX, Zhang W, Yuan Y, Wang ZX - Chinese medical journal (2016). Not altered. CC.