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The aim: to compare disease-free survival time (DFS) in high-risk non-muscle-invasive bladder cancer patients treated with adjuvant hyperthermic intravesical chemotherapy and standard BCG therapy. Materials and methods: patients were divided into 2 groups. Group 1 (control) included patients who received adjuvant therapy after TURB with BCG vaccine (BCG therapy group; n=50), group 2 (study group) included patients (HIVEC® therapy group; n=46 ), who received adjuvant intravesical chemotherapy using a Combat BRS HIVEC® device for local hyperthermia. Results: median follow-up was 23 months (range 4 - 36). Tumor recurrence was reported in 19 patients receiving intravesical BCG therapy and in 8 patients receiving intravesical hyperthermic chemotherapy. The incidence of DFS in patients receiving chemohyperthermy was statistically higher than in patients receiving BCG therapy (log-rank test result: p=0.029). Conclusions: The method of hyperthermic intravesical chemotherapy significantly increased the 2-year disease-free survival rate - 82.6 % versus 62 % BCG therapy group (p=0.025). Its use in the future will allow increasing the frequency of organ-preserving treatment of patients with primary and recurrent muscular-non-invasive bladder tumors Author Biography Roman Chystiakov, Odessa National Medical University Assistant Department of Radiation Diagnostic, Therapy and Oncology

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