title: MR imaging of a malignant schwannoma and an osteoblastoma with fluid-fluid levels. Report of two new cases.
abstract: One case of malignant schwannoma of the sacrum and another of occipital osteoblastoma were evaluated by MR imaging. Both tumors showed fluid-fluid levels with different signal intensities in the sequences performed. Pathologic examination revealed hemorrhagic fluid in both tumors. Malignant schwannoma and osteoblastoma should be included in the list of bone and soft-tissue with fluid-fluid levels. Our data confirm the non-specificity of this finding, which only suggests the presence of previous intratumoral hemorrhage.
authors.affiliation: Centre Diagnòstic Pedralbes, Ressonància Magnètica, Barcelona, Spain.
authors.forename: J C
authors.initials: JC
authors.lastname: Vilanova
authors.forename: J L
authors.initials: JL
authors.lastname: Dolz
authors.forename: J L
authors.initials: JL
authors.lastname: Maestro de Leon
authors.forename: A
authors.initials: A
authors.lastname: Aparicio
authors.forename: J
authors.initials: J
authors.lastname: Aldomà
authors.forename: A
authors.initials: A
authors.lastname: Capdevila
mesh_terms: D000328:Adult; D001826:Body Fluids; D017824:Bone Cysts, Aneurysmal / Q000150:complications / Q000175:diagnosis; D001859:Bone Neoplasms / Q000150:complications / Q000175:diagnosis*; D003937:Diagnosis, Differential; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009442:Neurilemmoma / Q000175:diagnosis*; D009777:Occipital Bone / Q000473:pathology; D018215:Osteoblastoma / Q000150:complications / Q000175:diagnosis*; D012447:Sacrum / Q000473:pathology