Progressive External Ophthalmoplegia with Mitochondrial Dna Deletions, Autosomal Dominant 6, also known as mitochondrial dna deletion syndrome with progressive myopathy, is related to seckel syndrome 8 and seckel syndrome, and has symptoms including muscle cramp, myalgia and dyspnea on exertion. An important gene associated with Progressive External Ophthalmoplegia with Mitochondrial Dna Deletions, Autosomal Dominant 6 is DNA2 (DNA Replication Helicase/Nuclease 2), and among its related pathways/superpathways are Mitochondrial iron-sulfur cluster biogenesis and Cytosolic iron-sulfur cluster assembly. Related phenotypes are progressive external ophthalmoplegia and limb-girdle muscle weakness