| Phenotype details |
see paper; ..., normal pregnancy, normal delivery; hypotonia; nystagmus; not sitting; not walking; truncal ataxia; no tremor; no dysmetria; no speech; no speech; severe intellectual disability; severe behavioral anomalies, temper tantrums, aggressivity, inappropriate laughing, crying; development slow progress then stagnation, no regression; 5y-profound bilateral sensorineural deafness; normal ears; 2m-nystagmus, strabism; hypertelorism; 22y-MRI brain normal mesencephalon, major pons hypoplasia, absence protuberance’s bulging, hypoplasia medulla, antero posterior flattening medulla, severe vermian hypoplasia (near absence), hypodysplasia cerebellar hemispheres, normal vestibulocochlear nerve, normal cochlea, normal semi-circular canal |