RT Journal Article SR Electronic T1 Primary Angiitis of the Central Nervous System and Silent Cortical Hemorrhages JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1561 OP 1563 VO 23 IS 9 A1 Hakan Ay A1 Gürdal Şahin A1 Işıl Saatci A1 Figen Söylemezoğlu A1 Okay Sarıbaş YR 2002 UL http://www.ajnr.org/content/23/9/1561.abstract AB Summary: Primary angiitis of the CNS is histopathologically characterized by ischemic lesions and small petechial hemorrhages. Unlike CT or conventional MR imaging, gradient-echo MR imaging depicts these chronic petechial hemorrhages. We herein report the case of biopsy-proved primary angiitis of the CNS in a 42-year-old man; whom gradient-echo MR imaging revealed multiple petechial hemorrhages in the cortical-subcortical brain regions. The identification of petechial hemorrhages by gradient-echo MR imaging promises to be a valuable surrogate marker supporting the diagnosis of primary angiitis of the CNS.