| Phenotype details |
onset 14y with tip-toe walking; Proximal & distal muscle weakness, legs>arms, mild; Difficulty walking, running & climbing steps; Positive Gowers sign; Mild foot dorsiflexion weakness; Elevated CPK; Thigh & shin MRI suggestive of mild degree myositis; Muscle biopsy suggestive of a dystrophic process; EMG-NCV: chronic myopathic disorder. |