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.



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