| Phenotype details |
see paper; ..., delayed gross motor development, 10m-sit, 12m-crawl, 20m-walk, Gowers' sign, never ran; progressive calf muscle enlargement, poor weight gain, intermittent joint pain; failure to thrive weight 19 kg (<5th), height 118cm (10th); bilateral calf pseudohypertrophy; hypotonia, globally reduced deep tendon reflexes; elevated serum creatine kinase level 1200 IU/L |