title: Radiation-induced bilateral cystic frontal lobe necroses demonstrating a fluid-blood level--case report.
abstract: A 41-year-old male developed radiation-induced bilateral cystic frontal lobe necroses after irradiation for an olfactory neuroblastoma. Computed tomography (CT) and magnetic resonance (MR) imaging revealed the lesions, one containing a fluid-blood level on CT scans and niveau formation on MR images. It was proved to be a coagulated hematoma within the cyst at surgery. Such a fluid-blood level in a radiation-induced cyst has never been reported, although hemorrhage frequently accompanies delayed radiation necrosis. Positron emission tomography with multiple tracers may be useful in differentiating cerebral radiation necrosis from tumor recurrence, because of absence of abnormal tracer accumulation.
authors.affiliation: Neurosurgical Service, Akita University School of Medicine.
authors.forename: K
authors.initials: K
authors.lastname: Mineura
authors.forename: T
authors.initials: T
authors.lastname: Sasajima
authors.forename: M
authors.initials: M
authors.lastname: Kowada
authors.forename: T
authors.initials: T
authors.lastname: Ogawa
mesh_terms: D000328:Adult; D001826:Body Fluids / Q000000981:diagnostic imaging; D001927:Brain Diseases / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology; D001932:Brain Neoplasms / Q000532:radiotherapy; D003560:Cysts / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology*; D005625:Frontal Lobe / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009336:Necrosis; D018241:Neuroectodermal Tumors, Primitive, Peripheral / Q000532:radiotherapy; D009830:Olfactory Bulb; D011832:Radiation Injuries / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology*; D011878:Radiotherapy / Q000009:adverse effects; D014055:Tomography, Emission-Computed; D014057:Tomography, X-Ray Computed