Supplementary Material for: Parkinsonian Patients with Striatal Cribriform State Present Rapidly Progressive Axial Parkinsonism

<i>Objective:</i> To define the significance of striatal cribriform state (SCS) observed in patients with primary progressive parkinsonism. <i>Methods:</i> We reviewed medical records and brain magnetic resonance imaging studies of 1,260 patients with primary progressive parkinsonism. We identified 23 patients with SCS and analyzed their clinical features. <i>Results</i>: All 23 patients had rapidly progressive parkinsonism predominated by postural instability and gait disturbance. Clinical features of 18 of the 23 patients were compatible with progressive supranuclear palsy (PSP); 2 patients were compatible with parkinsonian type multiple system atrophy; 2 patients were compatible with mixed clinical features of both; and 1 patient had PSP-like clinical features. <i>Conclusions:</i> Most parkinsonian patients with SCS present rapidly progressive parkinsonism predominated by postural instability and gait disturbance. SCS observed in patients with parkinsonism does not seem to be a coincidental finding associated with the generalized cerebrovascular process.