Transurethral resection and surveillance of bladder cancer supported by 5-aminolevulinic acid-induced fluorescence endoscopy

Purpose: We determined whether neoplastic disease, which was missed under w hite light can be found during transurethral resection of bladder cancer by 5-aminolevulinic acid-induced porphyrin fluorescence. Materials and Method s: 5-Aminolevulinic acid-induced fluorescence endoscopy was carried out in 328 cases. A 3% 5-aminolevulinic acid solution was instilled intravesically in a mean time of 2.8 h before endoscopy, The fluorescence was excited by a special incoherent light source which provided blue light in addition to white light. Results: In 82 (25%) cases additional neoplastic lesions were found only because of their red porphyrin fluorescence which was induced by 5-aminolevulinic acid. 31% of these neoplastic foci which were found in no rmal and nonspecific inflamed mucosa had a poorly differentiated histology. Conclusions: 5-Aminolevulinjc acid facilitates detection of neoplastic dis ease during transurethral resection of bladder cancer and increases the acc uracy of diagnosis.