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Search for: [Abstract = "Introduction\: Bladder Cancer is a serious problem of urological oncology. Bladder cancer is the fourth most common cause of cancer deaths in men and fifteenth in women. Transitional cell carcinoma is a heterogeneous disease. Seventy percent of bladder tumors present as non\-muscle invasive bladder cancer \- superficial disease and the rest as muscle invasive disease. 50% \- 70% of the patients with non\-muscle invasive bladder cancer suffer a local recurrence, whereas in 10\-30% of the patients a progression is observed. The current standard for diagnosing bladder cancer is by white light cystoscopy. Macroscopic tumors are relatively easy to visualize but carcinoma in situ \(Cis\), dysplasia and small tumors of non typical location can be overlooked. It is connected with high rate of recurrence and because of it we are looking for new method, which could decrease an influence of surgeon for quality of TURBT and could allow of recognition all neoplastic lesions and in this way could increase range of TURBT, decrease recurrence rate, extend time intervals between TURBT procedure and recurrence of disease and decrease percentage of progression. Photodynamic Diagnosis grants above\-mentioned criteria. PDD is based on the preferential accumulation of photoactive porphyrins in neoplastic cells, which fluoresce red under blue light illumination, enabling visualization of the tu"]

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