| Phenotype details |
born at term after, uneventful pregnancy; birth weight/height/head circumference normal; mild developmental delay, hypotonia, lingual protrusion; 11m-crawling, 24m-walking; 6y-intellectual disability, severe attention and learning difficulties, autistic traits preferring to be alone; 7y-started to speak few words; 10y facial dysmorphy with mandibular prognathism, open mouth fixed O position, protruded tongue, bushy eyebrows, flat philtrum; MRI brain and ECG normal; metabolic investigations normal except rISED serum creatine phosphokinase (341IU) |