Early Detection of Bronchial Lesions Using Autofluorescence Endoscopy
Author Information
Author(s): MASATOSHI KAKIHANA, KIM KYONG IL, TETSUYA OKUNAKA, KINYA FURUKAWA, TAKASHI HIRANO, CHIMORI KONAKA, HARUBUMI KATO, YOSHIRO EBIHARA
Primary Institution: Tokyo Medical University
Hypothesis
Can a simple fluorescence endoscopy system with a conventional Xenon lamp effectively detect early cancer and dysplasia of the bronchus?
Conclusion
The newly developed autofluorescence system significantly improved the detection rates of early cancer and dysplasia compared to standard bronchoscopy.
Supporting Evidence
- The sensitivity for detecting cancer and dysplasia was 66% for standard bronchoscopy and 92% for the autofluorescence system.
- The positive predictive value for cancer and dysplasia was 62% for standard bronchoscopy and 71% for the autofluorescence system.
- Early cancer was detected in 4 cases with abnormal sputum cytology findings.
- Dysplasia was diagnosed in 9 cases with abnormal sputum cytology findings.
- SAFE diagnosed 45 sites of dysplasia with a specificity of 88%.
Takeaway
Doctors used a special camera to look for early signs of lung cancer and found that it worked much better than the usual method.
Methodology
A prototype autofluorescence endoscopy system was used to examine 72 cases, with biopsies taken from suspicious areas after conventional bronchoscopy.
Potential Biases
Potential overdiagnosis in cases with bronchitis.
Limitations
False positives were common in cases with bronchitis, and the study did not routinely obtain negative control biopsies.
Participant Demographics
48 men and 24 women, aged 49-79.
Statistical Information
Statistical Significance
p<0.05
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