Clinical Efficacy of Neoadjuvant Intravesical Mitomycin-C Therapy Immediately Before Transurethral Resection of Bladder Tumor in Patients With Nonmuscle-invasive Bladder Cancer: Preliminary Results of a Prospective, Randomized Phase II Study. Letter.

Abstract

You have accessJournal of UrologyLetters to the Editor1 Apr 2023Clinical Efficacy of Neoadjuvant Intravesical Mitomycin-C Therapy Immediately Before Transurethral Resection of Bladder Tumor in Patients With Nonmuscle-invasive Bladder Cancer: Preliminary Results of a Prospective, Randomized Phase II Study. Letter. Ashish Ranjan, Ankit Misra, Sanjoy Kumar Sureka, and Uday Pratap Singh Ashish RanjanAshish Ranjan Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India More articles by this author , Ankit MisraAnkit Misra * E-mail Address: [email protected] Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India More articles by this author , Sanjoy Kumar SurekaSanjoy Kumar Sureka Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India More articles by this author , and Uday Pratap SinghUday Pratap Singh Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India More articles by this author View All Author Informationhttps://doi.org/10.1097/JU.0000000000003363AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookTwitterLinked InEmail J Urol. 2023;209(1):131-139. To the Editor: We read with great interest the study investigating the novel role of intravesical mitomycin-C (MMC) in nonmuscle-invasive bladder cancer (NMIBC) in a neoadjuvant setting.1 Single, immediate, post-transurethral resection of bladder tumor (TURBT) instillation of MMC is the standard protocol in NMIBC.2 It primarily reduces the recurrence risk by eliminating viable residual tumors and preventing reseeding of the free-floating cancer cells.3 However, fear of extravasation and its associated serious complications has led to its low practical compliance worldwide.4 This study has demonstrated the use of neoadjuvant intravesical MMC for NMIBC with promising therapeutic efficacy, better tolerability, and low significant adverse effects. Although the dose and schedule of neoadjuvant MCC followed in the study were convenient for the patient, we would like to know the scientific basis for using 2 doses at a specific interval. The writers mention a preliminary study for deciding on 2 doses of neoadjuvant MMC, but no reference has been given. Do the authors feel that the control group should have received a single immediate post-TURBT MMC per the standard? Were any morphological or radiological criteria considered before administering the neoadjuvant therapy? The rationale of giving MMC post-TURBT is only to give it to patients with superficial disease on resection. Would it not be an overtreatment and waste of resources on those that eventually come out as muscle invasive? MMC concentration in tumor and normal tissue was measured to know about uptake, but is there any standard concentration in the postoperative instillation setting to which it was matched? Moreover, it would be interesting to know the method used to detect the concentration of MMC in the tissue. Would continuous saline irrigation used during the TURBT have diluted the effect of MMC on the tissue? Multifocal tumors were more in the control arm (24, 63%) than in the intervention arm (15, 46%). Was this difference statistically significant? This could have a bearing on better recurrence-free survival in the intervention arm and more progression in control. Lastly, we appreciate the authors' focus on an important area in NMIBC treatment. REFERENCES 1. . Clinical efficacy of neoadjuvant intravesical mitomycin-C therapy immediately before transurethral resection of bladder tumor in patients with nonmuscle-invasive bladder cancer: preliminary results of a prospective, randomized phase II study. J Urol. 2023; 209(1):131-139. Link, Google Scholar 2. . Trial-based cost-effectiveness analysis of an immediate postoperative mitomycin C instillation in patients with non–muscle-invasive bladder cancer. Eur Urol Open Sci. 2022; 37:7-13. Crossref, Medline, Google Scholar 3. . Continuous saline bladder irrigation in reducing recurrence and progression when compared to immediate mitomycin-C instillation post-resection of bladder tumor: a short communication. Asian Pac J Cancer Prev. 2022; 23(1):171-175. Crossref, Medline, Google Scholar 4. . Systematic review and individual patient data meta-analysis of randomized trials comparing a single immediate instillation of chemotherapy after transurethral resection with transurethral resection alone in patients with stage pTa-pT1 urothelial carcinoma of the bladder: which patients benefit from the instillation?Eur Urol. 2016; 69(2):231-244. Crossref, Medline, Google Scholar Submitted December 19, 2022; accepted February 2, 2023; published 000. © 2023 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 209Issue 4April 2023Page: 677-678 Advertisement Copyright & Permissions© 2023 by American Urological Association Education and Research, Inc.MetricsAuthor Information Ashish Ranjan Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India More articles by this author Ankit Misra Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India * E-mail Address: [email protected] More articles by this author Sanjoy Kumar Sureka Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India More articles by this author Uday Pratap Singh Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India More articles by this author Expand All Submitted December 19, 2022; accepted February 2, 2023; published 000. Advertisement Advertisement PDF downloadLoading ...