These disorders include congenital muscular dystrophy with complete merosin deficiency (MDC1A), congenital muscular dystrophy with partial merosin deficiency, and autosomal recessive limb-girdle muscular dystrophy 23 (LGMDR23) (5). The gene discussed is LAMA2; the disease is muscular dystrophy, limb-girdle, autosomal recessive 23.