A Case of Disseminated Polycystic Dilated Perivascular Spaces Presenting with Dementia and Parkinsonism

The perivascular spaces (PVSs) of the brain are lined with pia and contain interstitial fluid. In general, PVSs are small, asymptomatic, and identifiable at all ages. When PVSs are significantly enlarged, they can produce various clinical manifestations such as headache and dizziness. A 67-year-old man was admitted with cognitive impairment and gait disturbance with a 5-month history. Brain MRI showed multiple cystic PVSs in periventricular and subcortical white matter of both hemispheres. Medication with dopaminergic agents produced a moderate clinical improvement, while anticholinesterase was not effective. This case suggests that disseminated polycystic dilated PVSs may present with dementia and Parkinsonism.