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Photodynamic therapy in the management of resistant lower urinary tract carcinoma
Author(s) -
Nseyo Unyime O.,
Dougherty Thomas J.,
Sullivan Laurie
Publication year - 1987
Publication title -
cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.052
H-Index - 304
eISSN - 1097-0142
pISSN - 0008-543X
DOI - 10.1002/1097-0142(19871215)60:12<3113::aid-cncr2820601242>3.0.co;2-2
Subject(s) - medicine , urology , urethra , photodynamic therapy , photosensitizer , carcinoma , urinary system , prostatic urethra , transitional cell carcinoma , surgery , bladder cancer , cancer , prostate , chemistry , organic chemistry
Twenty‐three patients with resistant transitional cell carcinoma (TCC) of the bladder and posterior urethra had photodynamic therapy (PDT). Seventy‐two hours after an intravenous injection with 2 mg/kg of the photosensitizer dihematoporphyrin ether (DHE) (Photofrin II, Photomedica, Raritan, NJ), each patient received cystoscopic light treatment. The light dose to the whole bladder using the bulb diffuser ranged from 5 to 60 J/cm 2 ; power density ranged from 9 to 22 mW/cm 2 . The focal light dose ranged from 100 to 200 J/cm 2 at a power density from 100 to 200 mW/cm 2 . To treat the urethra, a diffuser fiber was used to deliver 200 to 400 J/linear cm at a power of 110 to 300 mW/cm. In the 19 of 23 patients who were treated for resistant superficial TCC, 833% of the tumors had responded at the initial follow‐up evaluation. Seven patients had a complete response and 10 had a partial response. Three of 19 patients who received inadequate light treatment failed to respond. Control of intractable gross hematuria was the only benefit for patients with locally invasive disease (⩾T2). Irritating lower urinary tract symptoms that varied in severity and duration occurred in all patients. Four patients experienced bladder shrinkage, which did not resolve. Although the light and drug doses remain to be determined, a whole bladder light dose of 15 to 20 J/cm 2 with a drug dose of 2 mg/kg seems to be effective enough without producing permanent adverse effects in the bladder.