Clinically, two forms are distinguished: a more severe form, congenital merosin-deficient muscular dystrophy (muscular dystrophy, congenital, merosin-deficient or partially deficient, MDC1A, OMIM_607855), and a milder form, limb-girdle muscular dystrophy (muscular dystrophy, limb-girdle, autosomal recessive 23, LGMDR23, OMIM_618138). Here, LAMA2 is linked to muscular dystrophy.