myopathy distal type 4(redirected from Williams distal myopathy)
myopathy distal type 4A slowly progressive autosomal dominant muscular disorder (OMIM:614065) characterised by distal muscle weakness and atrophy affecting the extremities. Onset is in early adulthood, and patients remain ambulatory despite long disease duration. Muscle biopsy shows nonspecific changes with no evidence of rods, necrosis or inflammation.
Defects in FLNC, which encodes filamin C, cause myopathy distal type 4.