title: Amyloidoma presenting as a butterfly glioma on positron emission tomography scan and magnetic resonance-spectroscopy: a case report and review of the literature.
abstract: OBJECTIVE
  Isolated amyloidoma rarely involves the nervous system.
  
  
  METHODS
  We report a patient with progressively worsening triparesis and numbness in his extremities.
  
  
  RESULTS
  Magnetic resonance imaging (MRI) of the brain revealed a mass lesion involving both hemispheres, which on positron emission tomography (PET) scan and magnetic resonance-spectroscopy (MR-SPECT) appeared to be a butterfly glioma. However, neuropathological examination revealed a large area with localized vascular amyloidosis.
  
  
  CONCLUSIONS
  This is the first case of a localized central nervous system vascular amyloid to imitate a butterfly glioma on MRI and PET scan studies.
authors.affiliation: Department of Neurosurgery, Louisiana State University Health Sciences Center, Shreveport, Louisiana, USA.
authors.forename: Anthony H
authors.initials: AH
authors.lastname: Sin
authors.forename: Eduardo
authors.initials: E
authors.lastname: Gonzalez-Toledo
authors.forename: Marjorie
authors.initials: M
authors.lastname: Fowler
authors.forename: Alireza
authors.initials: A
authors.lastname: Minagar
authors.forename: Anil
authors.initials: A
authors.lastname: Nanda
mesh_terms: D000686:Amyloidosis / Q000175:diagnosis* / Q000503:physiopathology; D001932:Brain Neoplasms / Q000175:diagnosis* / Q000503:physiopathology; D005909:Glioblastoma / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation*; D008297:Male; D008875:Middle Aged; D018908:Muscle Weakness / Q000209:etiology; D049268:Positron-Emission Tomography / Q000295:instrumentation*