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Data regarding cerebral small vessel disease (SVD) burden and incidental small lesions on diffusion-weighted imaging (DWI) following aSAH are sparse.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Patients and methods:<\/jats:title>\n                    <jats:p>We retrospectively analyzed a prospective cohort of aSAH and ICH patients with brain MRI within 30\u2009days after onset from March 2015 to January 2023. White matter hyperintensity (WMH), lacune, perivascular space, cerebral microbleed (CMB), total SVD score, and incidental DWI lesions were assessed and compared between aSAH and ICH. Clinical and radiological characteristics associated with small DWI lesions in aSAH were investigated.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>We included 180 patients with aSAH (median age [IQR] 53 [47\u201361]\u2009years) and 299 with ICH (63 [53\u201373]\u2009years). DWI lesions were more common in aSAH than ICH (47.8% vs 14.4%, p\u2009&amp;lt;\u20090.001). Higher total SVD score was associated with ICH versus aSAH irrespective of hematoma location, whereas DWI lesions and strictly lobar CMBs were correlated with aSAH. Multivariable analysis showed that shorter time from onset to MRI, anterior circulation aneurysm rupture, CMB\u2009\u2a7e\u20095, and total SVD score were associated with DWI lesions in aSAH.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Discussion and conclusion:<\/jats:title>\n                    <jats:p>Incidental DWI lesions and strictly lobar CMBs were more frequent in aSAH versus ICH whereas ICH had higher SVD burden. Incidental DWI lesions in aSAH were associated with multiple clinical and imaging factors. Longitudinal studies to investigate the dynamic change and prognostic value of the covert hemorrhagic and ischemic lesions in aSAH seem justified.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/23969873241232327","type":"journal-article","created":{"date-parts":[[2024,2,19]],"date-time":"2024-02-19T07:59:25Z","timestamp":1708329565000},"page":"639-647","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Prevalence of small vessel disease and incidental DWI-positive lesions in patients with aneurysmal subarachnoid hemorrhage versus intracerebral hemorrhage"],"prefix":"10.1093","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7974-7075","authenticated-orcid":false,"given":"Zi-Jie","family":"Wang","sequence":"first","affiliation":[{"name":"Department of Neurology, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China 1"},{"name":"Department of Neurology, The 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