Nam KW, et al. - In adult Moyamoya diseases (MMD) patients without revascularization surgery, researchers explored the connection between an ipsilateral ivy sign [defined as a linear or focal high-signal intensity on fluid-attenuated inversion recovery images] and ischemic stroke recurrence [defined as a new clinical event that accompanied a new brain lesion on magnetic resonance imaging]. Overall, 84 subjects with 154 hemispheres were examined. According to results, the burdens of ivy sign exhibited a dose-response tendency with the 3-year ischemic recurrence rate. Findings r4evealed that the ivy sign is linked to ischemic recurrence in adult MMD patients in a dose-response manner. Selecting high-risk patients requiring revascularization surgery would be useful.