Assertion: rigid spine muscular dystrophy | /r/HasProperty | rigid spine syndrome
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text: However, individuals with a rigid spine and a mutation of the selenoprotein N1 (SEPN1) gene have been seen who fit the criteria for four different muscle conditions including rigid spine muscular dystrophy (rigid spine syndrome), congenital fiber type disproportion, desmin-related myopathy, and multiminicore myopathy.