title: A new lump.
authors.affiliation: Department of Radiology, Norfolk and Norwich University Hospital, Norwich NR4 7UY, UK.
authors.forename: S M
authors.initials: SM
authors.lastname: Williams
authors.forename: A M
authors.initials: AM
authors.lastname: Dean
mesh_terms: D016080:Arachnoid Cysts / Q000175:diagnosis* / Q000000981:diagnostic imaging; D002648:Child; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D014057:Tomography, X-Ray Computed