Detection of dysplasia and carcinoma in situ by ratio fluorometry

Journal Article · Tue Dec 01 00:00:00 EST 1992 · American Review of Respiratory Disease; (United States)

DOI:https://doi.org/10.1164/ajrccm/146.6.1458· OSTI ID:6821621

Lam, S; Hung, J Y; Kennedy, S M; Leriche, J C; Vedal, S; Nelems, B; Macaulay, C E; Palcic, B ^[1]

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1. Univ. of British Columbia, Vancouver, CA (United States)

Fluorescence bronchoscopy was performed in 82 volunteers recruited from occupational groups at risk of exposure to asbestos and/or diesel fumes to determine whether differences in tissue autofluorescence between normal and malignant bronchial tissues can be used to improve the sensitivity of standard fiberoptic bronchoscopy in detecting dysplasic and carcinoma in situ (CIS). This study consisted of 25 nonsmokers, 40 exsmokers, and 17 current smokers with mean ages of 52, 55, and 49 yr, respectively. Tissue autofluorescence was induced by a blue light from an He-Cd laser coupled to the illumination channel of the bronchoscope and analyzed by a ratiofluorometer. One or more sites of moderate or severe dysplasia were found in 12% of the exsmokers and current smokers but in none of the nonsmoker volunteers. CIS was found in two of the exsmokers. The sensitivity of fluorescence bronchoscopy (86%) was found to be 50% better than that of conventional white-light bronchoscopy (52%) in detecting dysplasia and CIS. Pre- and post-bronchoscopy sputum cytology failed to detect these precancerous lesions. Our results suggest that fluorescence bronchoscopy may be an important new method that can improve the ability to detect and localize precancerous and/or CIS lesions.

• OSTI ID: 6821621
• Journal Information: American Review of Respiratory Disease; (United States), Vol. 146:6; ISSN 0003-0805
• Country of Publication: United States
• Language: English

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