DETECTION OF EARLY BLADDER-CANCER BY 5-AMINOLEVULINIC ACID-INDUCED PORPHYRIN FLUORESCENCE

Purpose: We determined whether the sensitivity of detecting dysplasia or early bladder cancer can be improved by 5-aminolevulinic acid induc ed porphyrin fluorescence. Materials and Methods: A 3% 5-aminolevulini c acid solution was instilled intravesically before cystoscopy in 104 patients. The 5-aminolevulinic acid induced porphyrin fluorescence was excited by violet light from a krypton ion laser (wavelength 406.7 nm .). Results: The sensitivity of the fluorescence cystoscopy (96.9%) wa s significantly (p < 0.0001) greater than that of white light cystosco py (72.7%). There was no impact on specificity, Conclusions: Due to th e high sensitivity of the procedure fluorescence guided biopsies are r ecommended instead of random biopsies,