title: Proton nuclear magnetic resonance spectroscopy of serum from patients with colorectal neoplasia.
abstract: Proton nuclear magnetic resonance (NMR) spectra of serum have been recorded from patients with colorectal neoplastic polyps, before and after treatment of colorectal cancer, in patients with advanced lung cancer, and also from healthy controls. Digitally defined NMR profiles of the methyl and methylene peaks were used as input for supervised principal component modelling. An unknown sample was classified according to its residual, i.e. the difference between the spectral pattern of the unknown and control group. There was a statistically significant difference between the mean residual in the untreated colorectal cancer group and in controls (P = 0.003). The sensitivity of detecting untreated colorectal cancer was only 20%. There were no stage-dependent differences between the residuals within the untreated colorectal cancer group. After curative surgery, four patients had recurrence of malignant disease without an increase in residual prior to recurrence. Patients with advanced malignant disease (lung cancer WHO stage IIIB and IV) had a highly significant difference in mean residual from that of controls, with a sensitivity of detecting cancer of 87.5%. This increase in residual could not be explained by increase in the level of serum triglyceride. NMR spectroscopy was not a useful diagnostic tool in patients with colorectal neoplastic polyps and cancer.
authors.affiliation: Department of Oncology, Haukeland University Hospital, Bergen, Norway.
authors.forename: O
authors.initials: O
authors.lastname: Fluge
authors.forename: K S
authors.initials: KS
authors.lastname: Gilje
authors.forename: E
authors.initials: E
authors.lastname: Sletten
authors.forename: O M
authors.initials: OM
authors.lastname: Kvalheim
authors.forename: E
authors.initials: E
authors.lastname: Skaarland
authors.forename: J F
authors.initials: JF
authors.lastname: Halvorsen
authors.forename: M
authors.initials: M
authors.lastname: Farstad
authors.forename: O
authors.initials: O
authors.lastname: Sóreide
mesh_terms: D000328:Adult; D000368:Aged; D002097:C-Reactive Protein / Q000378:metabolism; D016022:Case-Control Studies; D015179:Colorectal Neoplasms / Q000097:blood / Q000175:diagnosis* / Q000473:pathology / Q000628:therapy; D005260:Female; D006801:Humans; D008055:Lipids / Q000097:blood; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009367:Neoplasm Staging; D018365:Neoplasm, Residual; D011522:Protons; D012680:Sensitivity and Specificity
chemical_list: D008055:Lipids; D011522:Protons; D002097:C-Reactive Protein