MATR3 and myopathy: Overall, ADSSL1 myopathy, Welander myopathy, myotilinopathy, MATR3 mutations associated with vocal cord and pharyngeal distal myopathy, filaminopathy, and MYOT-related myopathy appear to have a selective effect on parts of the hamstring muscles (semimembranosus and the long head of the biceps femoris muscles), while the anterior compartments are largely spared (24).