| Phenotype details |
intellectual disability (HP:0001249); elevated serum creatine phosphokinase (HP:003236) 467; not floppy at birth; no cardiomyopathy, mitral vavlve prolapse; skin change; muscle (4y6m)-weakly necrotic fiber, regenerative fiber, endomysial fibrosis, mitochondrial enlargement; no seizures; walk 3y6m |