Table 2.
Summary of clinical reports on MMPSI patients.
| No. of patients reviewed | 96 |
| No. of Refs. Reviewed | 16 |
| Males | 42.5% |
| Age at onset | |
| Average | 7.6 week |
| Range | 1 day – 7 month |
| Prognosis | |
| Developmental delay | 71% |
| Normal development | 1% |
| Hypotonia | 56% |
| Deceased | 21% |
| Causes – brain abnormalities | |
| Normal | 16 |
| Atrophy | 24 |
| Delayed myelination | 12 |
| Encephalopathy | 57 |
| Thin corpus callosum | 3 |
| Other lesions | 4 |
| Other findings | 7 |
| Not considered | 5 |
| Causes – genetic alterations (out of those sequenced) | |
| SCN1A | 2/32 |
| KCNT1 | 10/30 |
| TBC1D24 | 2/15 |
| Not considered | 47 |