title: Several early angiographic findings in brain abscess including "the ripple sign".
mesh_terms: D000293:Adolescent; D000328:Adult; D001922:Brain Abscess / Q000000981:diagnostic imaging*; D001929:Brain Edema / Q000000981:diagnostic imaging; D001932:Brain Neoplasms / Q000000981:diagnostic imaging; D002533:Cerebral Angiography; D002648:Child; D003937:Diagnosis, Differential; D004660:Encephalitis / Q000000981:diagnostic imaging; D005909:Glioblastoma / Q000000981:diagnostic imaging; D006561:Herpes Simplex / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008875:Middle Aged