MATR3 and myopathy: Although isolated MND has been reported in patients with mutations in various MSP‐ and MSP‐like genes (VCP, HNRNPA1, HNRNPA2B1 SQSTM1, and MATR3)3, 10, 29, 39, 40, 41 MND often coexisted with myopathy in our cohort.