| Phenotype details |
brith 39w+1; absent speech; delayed gross motor development; normal fine motor milestones; global developmental delay; 3y-focal seizures, well controlled; autism; central hypotonia; MRI brain normal; episodes of rage, ABA therapy; infancy failure to thrive; feeding problems, G-tube; dysmotility; no hypoventilation; no vision/eye abnormalities; no hearing impairment; no dysmorphic features; no congenital anomalies; muscle biopsy complex I defect, muscle structure normal on histochemicalanalysis and electron microscopy; severe dysautonomia (severe GI dysmotility, heart rate, temperature dysregulation), migraine headaches; episodic elevation of NH4 and ALT levels |