| Phenotype details |
uneventful pregnancy; normal birth measurements; sit-10m, walk-18m; language delayed, 5y-first words; 11y-not able to read or write; 10y-muscular pains during physical exercises, initially on feet, extending to legs and hands, associated with severe muscular fatigue; no motor deficiency, morphology 'athletic', global muscular hypertrophy; elevated CK (579 U/l, normal <160 U/l); no myoglobinuria, ECM myogenic pattern, muscle biopsy indicated non-specific histology; ECG and cardiac ultrasound normal; 16y-generalized epilepsy response to monotherapy; MRI brain normal; no dysmorphic features |