RIGID SPINE SYNDROME; RSS
MYOPATHY, SEPN1-RELATED
MUSCULAR DYSTROPHY, CONGENITAL, MEROSIN-POSITIVE, WITH EARLY SPINE RIGIDITY; MDRS1
MULTICORE MYOPATHY, SEVERE CLASSIC FORM
MINICORE MYOPATHY, SEVERE CLASSIC FORM
MULTIMINICORE DISEASE, SEVERE CLASSIC FORM
DESMIN-RELATED MYOPATHY WITH MALLORY BODIES
MUSCULAR DYSTROPHY, CONGENITAL, EICHSFELD TYPE