FKRP and muscular dystrophy: Muscular dystrophy–dystroglycanopathy type C5 [OMIM:607155] (also called limb–girdle muscular dystrophy type 2I, or more recently type R9), muscular dystrophy–dystroglycanopathy type A5 (also known as Walker–Warburg syndrome) [OMIM:613153] and muscular dystrophy–dystroglycanopathy type B5 [OMIM:606612] are AR dystroglycanopathies caused by mutations in the fukutin-related protein gene (FKRP) on chromosome 19q13.32.