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Background: Biliary papillomatosis is rare and often fatal. Liver resection or transplantation is recommended but may be impossible due to tumor or patient factors; furthermore, it appears to the authors of this study that no follow-up results after transplantation have been reported in previous studies., Methods: Bilobar but limited biliary papillomatosis in a man age 54 years was mapped by cholangiopancreatography, cholecystectomy, and operative cholangioscopy. After cholangioscopic electrocoagulation, iridium-192 wires were temporarily inserted into the affected bile ducts, giving a dose of 60 grays at a 3-mm distance. Another percutaneous cholangioscopic electrocoagulation was performed 3 weeks later., Results: The patient has been free of tumor and in good health for 80 months, but he has a long term stenting of a nonneoplastic stricture at the confluence of the bile ducts., Conclusions: Mechanical tumor reduction and intraluminal brachytherapy could possibly replace transplantation (which up to now has been suggested but not reported) when this life-threatening disease is bilobar, and also possibly replace liver resection for limited tumors in patients who are too frail for surgery., (Copyright 2000 American Cancer Society.)