title: MR imaging of brown tumour with fluid-fluid levels: a report of three cases.
abstract: Fluid-fluid levels on CT and MR imaging are a typical feature of aneurysmal bone cysts but have also been reported in many other osseous lesions containing haemorrhage. We report fluid-fluid levels in four brown tumour in three patients with primary hyperparathyroidism in which the initial radiological diagnosis was thought to be a bone tumour. To the authors' knowledge, this is the first time that association has been reported in the international literature.
authors.affiliation: Department of Radiology, Royal Orthopaedic Hospital, Birmingham, UK. Wendy.Turner@ro-tr.wmids.nhs.uk
authors.forename: A M
authors.initials: AM
authors.lastname: Davies
authors.forename: N
authors.initials: N
authors.lastname: Evans
authors.forename: D C
authors.initials: DC
authors.lastname: Mangham
authors.forename: R J
authors.initials: RJ
authors.lastname: Grimer
mesh_terms: D000328:Adult; D001847:Bone Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000209:etiology; D001859:Bone Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging / Q000473:pathology; D006101:Granuloma, Giant Cell / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000209:etiology; D006801:Humans; D006811:Humerus / Q000000981:diagnostic imaging / Q000473:pathology; D006961:Hyperparathyroidism / Q000150:complications*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D013977:Tibia / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed