Table 2.

Brain imaging features in individuals with C-terminal truncating MN1 variants

Feature	Prevalence
RES	8/10
Cerebellar dysplasia (other than RES)	4/10
Perisylvian polymicrogyria	9/10
Subcortical heterotopia	2/11
Ventriculomegaly	3/11
Thick rostral corpus callosum	6/11
Hypoplastic olfactory bulbs	4/8
Persistent trigeminal artery	7/10
Prominent posterior clinoid process	7/10
Hypertelorism	10/11

The frequencies are based uniquely on MRIs that were reviewed as a series at one centre.