title: Autofluorescence and Raman microspectroscopy of tissue sections of oral lesions.
abstract: Autofluorescence spectroscopy and Raman spectroscopy have been suggested for lesion diagnostics. We investigate the information contained in autofluorescence and Raman spectra recorded from oral tissue slices of various lesion types. Thirty-seven human oral mucosa lesions were biopsied and freeze-dried. Complete autofluorescence images and spectra were recorded from 20 microm sections. Raman spectra were acquired from the same positions for 12 of the sections. Cluster analysis was applied to find any relationship between spectral shape and lesion type or cell layer. Autofluorescence images showed high intensities for keratin layers and connective tissue, but hardly any for the epithelium. Autofluorescence spectra were centered around 520 nm and did not show specific spectral features. No clustering with regard to lesion type or cell layer was observed. Raman spectra allowed for reliable classification into cell layers, but differences between lesion types were not significant in this study. Autofluorescence spectra of freeze-dried oral mucosa sections did not contain useful information. A more comprehensive study is required for Raman spectra.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Division of Oncology, University Hospital Groningen, Groningen, The Netherlands.
authors.forename: D C G
authors.initials: DC
authors.lastname: de Veld
authors.forename: T C
authors.initials: TC
authors.lastname: Bakker Schut
authors.forename: M
authors.initials: M
authors.lastname: Skurichina
authors.forename: M J H
authors.initials: MJ
authors.lastname: Witjes
authors.forename: J E
authors.initials: JE
authors.lastname: Van der Wal
authors.forename: J L N
authors.initials: JL
authors.lastname: Roodenburg
authors.forename: H J C M
authors.initials: HJ
authors.lastname: Sterenborg
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000473:pathology; D016000:Cluster Analysis; D003238:Connective Tissue / Q000473:pathology; D004848:Epithelium / Q000473:pathology; D005612:Freeze Drying; D006801:Humans; D007633:Keratins / Q000378:metabolism; D009061:Mouth Mucosa / Q000473:pathology*; D009062:Mouth Neoplasms / Q000473:pathology; D013050:Spectrometry, Fluorescence; D013059:Spectrum Analysis, Raman
chemical_list: D007633:Keratins