Tumefactive Virchow‐Robin Spaces as a Cause of Secondary Parkinsonism

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Ethical Compliance Statement: The authors confirm that the approval of an institutional review board was not required for this work. Written informed consent from the patient was obtained for publication of this work, including the video material. We confirm that we have read the journal's position on issues involved in ethical publication and affirm that this work is consistent with those guidelines. Funding Sources and Conflict of Interest: No specific funding was received for this work. The authors declare that there are no conflicts of interest relevant to this work. Financial Disclosures for the Previous 12 Months: The authors declare that there are no additional disclosures to report. Data sharing is not applicable to this article as no new data were created or analyzed in this study. Figure S1. Brain imaging 6 weeks postsurgery. (A–G) Brain magnetic resonance imaging (MRI) reveals stable tumefactive perivascular spaces in both T2- (A–G) and T1-weighted images (F). Figure S2. Brain imaging 8 months postsurgery. (A–G) Brain magnetic resonance imaging (MRI) reveals stable tumefactive perivascular spaces in both T2- (A–G) and T1-weighted images (F). Figure S3. Brain imaging 20 months postsurgery. (A–G) Brain magnetic resonance imaging (MRI) reveals stable tumefactive perivascular spaces in both T2- (A–G) and T1-weighted images (F). Figure S4. Brain imaging 32 months postsurgery. (A–G) Brain magnetic resonance imaging (MRI) reveals stable tumefactive perivascular spaces in both T2- (A–D, F) and T1-weighted images (E). Table S1. Cases reporting movement disorders in the presence of type III tumefactive Virchow-Robin spaces in the mesencephalothalamic region. Table S2. Cases reporting movement disorders in the presence of type I tumefactive Virchow-Robin spaces along the perforating lenticulostriate arteries. Table S3. Cases reporting movement disorders in the presence of type II tumefactive Virchow-Robin spaces along the perforating medullary arteries. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.