LAMA2-related congenital muscular dystrophy (CMD; LAMA2-MD), also called merosin deficient CMD or MDC1A, is the most common subtype of CMD (Schorling et al., 2017; Sframeli et al., 2017; Mohassel et al., 2018; Mercuri et al., 2019). Here, LAMA2 is linked to congenital muscular dystrophy.