title: Focally increased activity on scinticisternography.
mesh_terms: D002561:Cerebrovascular Disorders / Q000175:diagnosis*; D006801:Humans; D011877:Radionuclide Imaging; D012709:Serum Albumin; D013667:Technetium
chemical_list: D012709:Serum Albumin; D013667:Technetium