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Hyperthermic intravesical chemotherapy with mitomycin‐C for the treatment of high‐risk non‐muscle‐invasive bladder cancer patients
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Hyperthermic intravesical chemotherapy with mitomycin‐C for the treatment of high‐risk non‐muscle‐invasive bladder cancer patients
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Journal Article
Hyperthermic intravesical chemotherapy with mitomycin‐C for the treatment of high‐risk non‐muscle‐invasive bladder cancer patients
2023
Overview
Objectives The objectives of the study are to explore tolerability, acceptability and oncological outcomes for patients with high‐risk non‐muscle‐invasive bladder cancer (NMIBC) treated with hyperthermic intravesical chemotherapy (HIVEC) and mitomycin‐C (MMC) at our institution. Patients and Methods Our single‐institution, observational study consists of consecutive high‐risk NMIBC patients treated with HIVEC and MMC. Our HIVEC protocol included six weekly instillations (induction), followed by two further cycles of three instillations (maintenance) (6 + 3 + 3) if there was cystoscopic response. Patient demographics, instillation dates and adverse events (AEs) were collected prospectively in our dedicated HIVEC clinic. Retrospective case‐note review was performed to evaluate oncological outcomes. Primary outcomes were tolerability and acceptability of HIVEC protocol; secondary outcomes were 12‐month recurrence‐free, progression‐free and overall survival. Results In total, 57 patients (median age 80.3 years) received HIVEC and MMC, with a median follow‐up of 18 months. Of these, 40 (70.2%) had recurrent tumours, and 29 (50.9%) had received prior Bacillus Calmette–Guérin (BCG). HIVEC induction was completed by 47 (82.5%) patients, but only 19 (33.3%) completed the full protocol. Disease recurrence (28.9%) and AEs (28.9%) were the most common reasons for incompletion of protocol; five (13.2%) patients stopped treatment due to logistical challenges. AEs occurred in 20 (35.1%) patients; the most frequently documented were rash (10.5%), urinary tract infection (8.8%) and bladder spasm (8.8%). Progression during treatment occurred in 11 (19.3%) patients, 4 (7.0%) of whom had muscle invasion and 5 (8.8%) subsequently required radical treatment. Patients who had received prior BCG were significantly more likely to progress (p = 0.04). 12‐month recurrence‐free, progression‐free and overall survival rates were 67.5%, 82.2%, and 94.7%, respectively. Conclusions Our single‐institution experience suggests that HIVEC and MMC are tolerable and acceptable. Oncological outcomes in this predominantly elderly, pretreated cohort are promising; however, disease progression was higher in patients pretreated with BCG. Further randomised noninferiority trials comparing HIVEC versus BCG in high‐risk NMIBC are required.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
