| Ultrasound findings | Confirmed on MRI | Additional MRI findings |
|---|---|---|
| Isolated mild ventriculomegaly n = 29 | 29 (100%) | 0 (0%) |
| Unisolated mild ventriculomegaly n = 17 | 16 (94%) | 1 (6%) |
| Isolated severe ventriculomegaly n = 8 (5/8 were progressive ventriculomegaly) | 7 (88%) | 1 (12%) |
| Unisolated severe ventriculomegaly n = 1 | 9 (90%) | 1 (10%) |