| Age at MRI (mean, range) |
3.1 years (3 months–14 years) |
| Presence of cerebellar cysts |
17/17 (100%) |
| Location of cysts |
|
| Involvement of both cerebellar hemispheres |
16/17 (94%) |
| Predominant involvement of the anterior vermis |
9/17 (53%) |
| Predominant involvement of the posterior hemispheres |
11/17 (65%) |
| Predominant involvement of the superior vermis and hemispheres |
16/17 (94%) |
| Cerebellar dysplasia |
17/17 (100%) |
| Hypoplasia of the inferior vermis |
10/17 (59%) |
| Splayed superior cerebellar peduncles |
9/17 (53%) |
| Enlargement of the fourth ventricle |
14/17 (82%) |
| Square shape of the fourth ventricle |
13/17 (77%) |
| Brainstem structural abnormalities |
6/17 (35%) |
| Supratentorial structural abnormalities |
2/17 (12%) |
