LAMA2 and muscular dystrophy, limb-girdle, autosomal recessive 23: To date, clinical studies on LAMA2-related disorders have primarily documented neuromuscular manifestations, which are limited to four well-characterized phenotypes (6, 23): (1) congenital muscular dystrophy type 1A (MDC1A) with complete merosin deficiency; (2) congenital muscular dystrophy with partial merosin deficiency; (3) late-onset autosomal recessive limb-girdle muscular dystrophy type 23 (LGMDR23); and (4) peripheral neuropathy.