Chulalongkorn Medical Journal


Background : Moyamoya is a rare cerebrovascular occlusive condition ofunknown etiology which has rarely been described in Thaipopulation. We report angiographic findings and clinicalfeatures from a single institution in Thailand.Objective : Describe angiographic findings and clinical features of moyamoyain patients.Design : Retrospective descriptive study.Setting : Department of Radiology, Faculty of Medicine, ChulalongkornUniversity.Materials and Methods : Twenty-five patients diagnosed with moyamoya and moyamoyalikeby cerebral angiography between 2003-2009 wereretrospectively reviewed for clinical manifestation andstenoocclusive lesions according to Suzuki Grading System.Results : Of the total 25 patients,19 were female (76%), 6 were male (24%),F:M = 3:1. Their median age was 38 years. Five of 6 pediatricpatients (83%) presented with ischemic stroke, only onepatient (17%) presented with hemorrhagic stroke, Thirteen of 19(68%) adult patients presented with hemorrhagic stroke, whereas6/19 (32%) presented with ischemic stroke. From 48 examinedcerebral hemispheres, none was grade as stage I (0%), 2 (4.2%)as stage II, 14 (29.2%) as stage III, 19 (39.6%) as stage IV, 12(25%) as stage V,1(2%) as stage VI.Conclusions : Clinical presentation and angiographic findings of moyamoya inthis study is consistent with prior observations, especially fromJapan. However, it differs from the studies in the United States,particularly in clinical manifestation.


Faculty of Medicine, Chulalongkorn University

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