LAMA2 and congenital muscular dystrophy: The laminin-alpha2 gene (LAMA2; MIM#156225) located on 6q22.33 is responsible for congenital muscular dystrophies, merosin-deficient congenital muscular dystrophy type 1A (MDC1A; MIM#607855) and late-onset limb-girdle muscular dystrophy-23 (MIM#618138), in association with an autosomal recessive trait.