Dilated perivascular spaces and steno-occlusive changes in children and adults with moyamoya disease.

"Declarations Ethics approval and consent to participateThis study was approved by the Ethics Committee of Pusan National University Yangsan Hospital (Institutional Review Board number: 05-2017-147). Written informed consent was waived by the Ethics Committee of Pusan National University Yangsan Hospital due to the retrospective nature of this study. It also adhered to international guidelines established for scientific research involving human participants as established by the Declaration of Helsinki and its subsequent amendments. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This study was supported by a 2022 research grant from Pusan National University Yangsan Hospital."