[Collaborative study of UFT in far-advanced renal cell carcinoma. Urological Cooperative UFT Study Group]

A cooperative study of UFT was conducted in cases of far-advanced renal cell carcinoma. UFT was administered daily at a dose of 300-600 mg FT equivalent for at least 4 weeks. Forty-one patients were entered into the protocol from the 19 collaborating institutions in the group. The antitumor effects of the drug were clinically evaluable in 25 patients according to the response criteria proposed by the Koyama-Saito study group. Seven were not eligible and 9 were cases of protocol violation. Complete response (CR) and partial response (PR) were observed in 2 and 5 patients, respectively, showing a response rate of 28.0%. One patient showed minor response, 8 stable disease and 9 progressive disease. It took about 22 weeks and 16 weeks to attain CR and PR, respectively. Lung metastasis was the lesion showing most the favorable response to this treatment. Twenty-eight patients were used for evaluating the adverse effects of the drug. Gastrointestinal symptoms such as nausea, vomiting and anorexia, were observed most frequently, while bone marrow suppression was minimal. Only three patients had to be taken off the drug due to its adverse effects. In conclusion, UFT was considered to be one of the most effective drugs for the treatment of far-advanced renal cell carcinoma.