LAMA2 and congenital muscular dystrophy: Clinically, LAMA2-RDs are commonly categorized into two phenotypic groups: a severe, early-onset presentation with features resembling CMD, widely known as merosin-deficient congenital muscular dystrophy type 1A (MDC1A), and a milder, late-onset presentation displaying characteristics indicative of limb-girdle muscular dystrophy (LGMD) [5].