MT-ATP6 and maternally-inherited Leigh syndrome: Mutations in MT-ATP6, like the most common mutations (m.8993T>G/C and m.9176T>G/C), as well as less frequent mutations (m.9035T>C, m.9185T>C, m.9191T>C, m.8914C>T, m.8701A>G), cause different clinical phenotypes of neuropathy, varying from NARP (Neuropathy, Ataxia, Retinitis Pigmentosa) to, encephalomyopathy and MILS (Maternally Inherited Leigh’s Syndrome; Guo Y. et al., 2018; Ichikawa et al., 2019; Capiau et al., 2022; Na and Lee, 2022).