title: Localized in vivo 1H magnetic resonance spectroscopy and in vitro analyses of heterogeneous brain tumors.
abstract: Results of magnetic resonance spectroscopic (MRS) studies of the chemical patterns in brain tumors have been inconsistent. Actual biochemical correlations are needed. In 2 patients with heterogeneous intracranial tumors, in vivo 1H MRS and in vitro biochemical analyses were correlated. Histology confirmed the tumor heterogeneity. Choline was elevated in the cellular portion of both tumors but decreased in the necrotic or cystic portions. Creatine was diffusely decreased while lactate was elevated in all regions of both tumors. Furthermore, the increase in the choline peak on 1H MRS appeared to be due to increases in water-soluble choline compounds. This study illustrates the value of small localized voxels for differentiating regional chemical differences in tumors.
authors.affiliation: Department of Neurology, F-9 Harbor-UCLA Medical Center Torrance 90509, USA.
authors.forename: L
authors.initials: L
authors.lastname: Chang
authors.forename: D
authors.initials: D
authors.lastname: McBride
authors.forename: B L
authors.initials: BL
authors.lastname: Miller
authors.forename: M
authors.initials: M
authors.lastname: Cornford
authors.forename: R A
authors.initials: RA
authors.lastname: Booth
authors.forename: S D
authors.initials: SD
authors.lastname: Buchthal
authors.forename: T M
authors.initials: TM
authors.lastname: Ernst
authors.forename: D
authors.initials: D
authors.lastname: Jenden
mesh_terms: D000328:Adult; D001932:Brain Neoplasms / Q000737:chemistry / Q000378:metabolism* / Q000473:pathology; D002794:Choline / Q000032:analysis; D003401:Creatine / Q000032:analysis; D005260:Female; D005997:Glycerylphosphorylcholine / Q000032:analysis; D006801:Humans; D006859:Hydrogen; D007773:Lactates / Q000032:analysis; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D008579:Meningioma / Q000737:chemistry / Q000378:metabolism / Q000473:pathology; D008875:Middle Aged; D009837:Oligodendroglioma / Q000737:chemistry / Q000378:metabolism / Q000473:pathology; D010767:Phosphorylcholine / Q000032:analysis; D012995:Solubility; D014867:Water
chemical_list: D007773:Lactates; D014867:Water; D010767:Phosphorylcholine; D005997:Glycerylphosphorylcholine; D006859:Hydrogen; D003401:Creatine; D002794:Choline