title: Fluid-fluid levels in a simple bone cyst on magnetic resonance imaging.
abstract: An unusual case is presented here of simple bone cyst (SBC) with fluid-fluid levels on MR and cementum-like substance on microscopy in an atypical location in the distal femur. Fluid-fluid levels are commonly described in the literature within aneurysmal bone cysts, giant cell tumour, chondroblastomas and telangiectatic osteosarcomas, but a literature review revealed only one reported case with multiple fluid levels occurring in a simple bone cyst on MRI. A cementum-like matrix is diagnostic of SBC and is seen in approximately 10% of cases.
authors.affiliation: Department of Radiology, Henry Ford Hospital, Detroit, MI 48202, USA.
authors.forename: E J
authors.initials: EJ
authors.lastname: Maas
authors.forename: J G
authors.initials: JG
authors.lastname: Craig
authors.forename: P K
authors.initials: PK
authors.lastname: Swisher
authors.forename: M B
authors.initials: MB
authors.lastname: Amin
authors.forename: N
authors.initials: N
authors.lastname: Marcus
mesh_terms: D001845:Bone Cysts / Q000175:diagnosis / Q000473:pathology*; D002648:Child; D005264:Femoral Fractures / Q000473:pathology; D005269:Femur / Q000473:pathology*; D005598:Fractures, Spontaneous / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male