Several clinical subtypes of progressive supranuclear palsy (PSP) have been described, including PSP-RS (PSP-Richardson’s syndrome), PSP-P (PSP-parkinsonism), PSP-PGF (PSP-progressive gait freezing), PSP-PNFA (PSP-progressive non-fluent aphasia) and PSP-bvFTD (PSP-behavioural variant of frontotemporal dementia) [
1]. Cerebellar involvement as the initial clinical presentation was reported in a minority of PSP patients in previous studies, and seems to be more prevalent in Asia than in Western countries [
2‐
5]. …