TTN and congenital myopathy: Seven patients had congenital muscular dystrophies: LAMA2-related dystrophy (n = 5), COL6-related dystrophies (n = 1) or α-dystroglycanopathy (n = 1), and three patients had congenital myopathies: DNM2-related myopathy (n = 1) and TTN-related myopathy (n = 2).