Myopathy, Distal, 4, also known as distal myopathy with posterior leg and anterior hand involvement, is related to hemifacial hyperplasia and cardiomyopathy, familial hypertrophic, 26, and has symptoms including calf muscle weakness An important gene associated with Myopathy, Distal, 4 is FLNC (Filamin C). Affiliated tissues include skeletal muscle and heart, and related phenotypes are difficulty walking and intrinsic hand muscle atrophy