In contrast to this GLDN‐associated lethal congenital arthrogryposis and congenital myopathy Compton‐North, resulting from homozygous CNTN1 variants, are only associated with a severe phenotype, leading to death early in life, mostly after the first days, almost independent of the type of variant.15, 22. This evidence concerns the gene GLDN and congenital myopathy with cores.