Non-dystrophic myotonias are rare diseases caused by mutations in key skeletal muscle ion channels. The major clinical manifestation is muscle stiffness as a consequence of the myotonia. Additional common symptoms include pain, weakness and fatigue. They are considered to be distinct from myotonic dystrophy because of the absence of progressive weakness and systemic features. Non-dystrophic myotonias include myotonia congenita, paramyotonia congenita, and sodium channel myotonias.
Category
Nervous system disease; Musculoskeletal disease
Brite
Human diseases in ICD-11 classification [BR:br08403]
08 Diseases of the nervous system
Diseases of neuromuscular junction or muscle
Primary disorders of muscles
8C71 Myotonic disorders
H01780 Non-dystrophic myotonia
Trivedi JR, Bundy B, Statland J, Salajegheh M, Rayan DR, Venance SL, Wang Y, Fialho D, Matthews E, Cleland J, Gorham N, Herbelin L, Cannon S, Amato A, Griggs RC, Hanna MG, Barohn RJ
Title
Non-dystrophic myotonia: prospective study of objective and patient reported outcomes.
