C9orf72 and inborn mitochondrial metabolism disorder: The genetic syndromes reported in the literature are 22q11 deletion syndrome, Prader–Willi syndrome, C9orf72 mutations, Fragile X premutation disorders [143,144], BSC1L mutation [145], 3q29 recurrent deletion [146], 15q duplication syndrome [147], and genetic mitochondrial disorders [148].