Reply to Editorial Comment: Current and Innovative Approaches to Bladder Substitution and Urinary Diversion: Strategies to Minimize Gut Related Complications

Ileal-based urinary diversions (UD) have stood the test of time and remain among the most durable and widely used options for bladder substitution. However, the use of intestinal segments for urinary diversion is inherently associated with a range of metabolic and functional morbidities related to the physiology of bowel tissue.1-4 Over the past 2 decades, tissue engineering has been extensively explored as a potential strategy to overcome the limitations of gut-based UD, although significant translational challenges have limited its widespread clinical application.5 In this review, we presented the current landscape as well as emerging innovations aimed at reducing the morbidity associated with gut-based UD. In particular, we introduced the concept of using tissue expanders as a potential strategy for bladder substitution and composite neobladder creation. At present, bladder transplantation appears to be the only potentially viable alternative to conventional bowel-based reconstruction. Nevertheless, its technical complexity, limited indications, and the long-term implications of lifelong immunosuppression must be carefully considered before broader clinical adoption.6 Until a durable and reproducible alternative that avoids gut-related metabolic complications is established, the ileum-based UD will remain a cornerstone of bladder substitution. Future progress in this field will depend on multidisciplinary collaborative effort to ensure durability and patient-reported quality of life outcomes.