Endoscopic light-induced autofluorescence spectroscopy for the diagnosis of colorectal cancer and adenoma.
To evaluate the new, bio-optical method of light-induced autofluorescence spectroscopy for the endoscopic in-vivo diagnosis of (pre)-cancerous lesions of the colorectum, 311 endogenous fluorescence spectra were obtained from normal, adenomatous and cancerous colorectal tissue in 11 patients with cancer, six patients with familial adenomatous polyposis, and six patients with multiple adenomatous polyps. A light source delivered either white or violet-blue light for excitation of tissue autofluorescence via a flexible endoscope. Endogenous fluorescence spectra emitted by the tissue were picked up with a fiberoptic probe and analysed with a spectrograph. Biopsies were taken for definitive classification of the spectra. Rectal cancer (n=11) as well as adenomas with severe dysplasia (n=19) showed specific differences between the emitted fluorescence spectra as compared with normal mucosa and hyperplastic polyps. Having applied a mathematical algorithm to the spectra, a sensitivity of 96% and a specificity of 93% were obtained for the diagnosis of rectal cancer. The equivalent values for the diagnosis of dysplastic ademomas were 98 and 89%, respectively. Light-induced autofluorescence spectroscopy is a new and promising bio-optical procedure for the endoscopic in-vivo diagnosis of colorectal cancer and dysplasia.
Department of Medicine I, Friedrich Alexander Universität Erlangen-Nürnberg, Ulmenweg 18, 91054, Erlangen, Germany. bridgitte.mayinger@med1.imed.uni-erlangen.de
Brigitte
B
Mayinger
Martin
M
Jordan
Peter
P
Horner
Christof
C
Gerlach
Steffen
S
Muehldorfer
Birgit R
BR
Bittorf
Klaus E
KE
Matzel
Werner
W
Hohenberger
Eckhart G
EG
Hahn
Klaus
K
Guenther
D000236:Adenoma / Q000175:diagnosis*; D011125:Adenomatous Polyposis Coli / Q000175:diagnosis*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003111:Colonic Polyps / Q000175:diagnosis; D003113:Colonoscopy / Q000379:methods*; D015179:Colorectal Neoplasms / Q000175:diagnosis*; D004867:Equipment Design; D005260:Female; D005773:Gastroscopy / Q000379:methods*; D006801:Humans; D007413:Intestinal Mucosa / Q000166:cytology / Q000473:pathology; D008297:Male; D008875:Middle Aged; D012004:Rectal Neoplasms / Q000175:diagnosis*; D015203:Reproducibility of Results; D013050:Spectrometry, Fluorescence; D014978:Xenon
D014978:Xenon