label: Nonaka Myopathy
label_lc: nonaka myopathy
description: An autosomal recessive condition caused by mutation(s) in the GNE gene, encoding bifunctional UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase. It is characterized by distal muscle weakness and atrophy, especially the tibialis anterior, and sparing of the quadriceps.