RT Journal Article SR Electronic T1 Vasculitis presenting as primary leptomeningeal enhancement with minimal parenchymal findings. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 26 OP 28 VO 14 IS 1 A1 C Negishi A1 G Sze YR 1993 UL http://www.ajnr.org/content/14/1/26.abstract AB In this case of biopsy-proved granulomatous angiitis, MR showed prominent leptomeningeal enhancement with comparatively little parenchymal involvement. Pathologically, granulomatous angiitis chiefly affects small vessels, with a predilection for those in the leptomeninges. Although marked leptomeningeal enhancement is not the most common finding, vasculitis should be added to the differential diagnosis of this MR appearance.