Table 1.
Family | 1 | 2 | 3 | 4 | ||
---|---|---|---|---|---|---|
Individual | 1 | 2 | 3 | 4 | 5 | 6 |
Variants (NM_015354) | p.Ile302Valfs∗7 | p.Ile302Valfs∗7 | p.Arg1678Profs∗13 (hmz) | p.Trp630∗ | ||
p.Trp1048∗ | p.Trp1048∗ | p.Gln1360∗ | ||||
Gender | F | F | F | F | F | F |
Age at death | 5 months | 5 weeks | 7 months | 2 years 7 months | 2.5 months | 1 month |
Cause of death | respiratory failure | respiratory failure | respiratory failure | respiratory failure | respiratory failure | respiratory failure |
Ophthalmologic abnormalities | + | + | + | + | − | + |
Congenital fetal nuclear cataracts | + | + | + | − | − | + |
Congenital heart defects | + | + | + | not tested | + | + |
Respiratory abnormalities | + | + | + | + | + | + |
Central hypoventilation | + | + | + | − | − | + |
Neurological abnormalities | + | + | + | + | − | + |
Hypotonia | + | + | + | + | − | + |
Seizures | − | − | + | + | − | + |
Poor oral co-ordination | + | + | + | − | − | − |
MRI abnormalities | + | + | + | + | + | + |
Thin corpus callosum | + | + | + | + | + | − |
Delayed myelination | + | + | − | + | + | − |
Loss of white matter | − | − | + | − | + | − |
Ventriculomegaly | + | + | + | + | − | + |
Abbreviations: F, female; hmz, homozygous; +, present; and −, absent.