PATHOGENESIS AND MANAGEMENT OF STONE DISEASE IN BRICKER-TYPE URINARY DIVERSION: A CASE-BASED APPROACH

Bricker-type urinary diversion, also known as ileal conduit urinary diversion, is a commonly performed surgical procedure for patients who require bladder removal, most often due to invasive bladder cancer. In this technique, a segment of the ileum is isolated and utilized as a conduit to divert urine from the ureters to an external stoma on the abdominal wall, facilitating continuous urinary drainage into a urostomy bag. While this procedure is generally effective and well-tolerated, long-term complications can occur, with urolithiasis in the conduit or upper urinary tract posing a significant clinical challenge. Stone formation in patients with Bricker-type diversions can be influenced by several factors, including urinary stasis, bacterial colonization, mucus secretion from the intestinal segment, foreign bodies such as surgical staples or sutures, and metabolic alterations like acidosis or hyperoxaluria. The altered anatomy and physiology of the urinary tract in these diversions create an environment conducive to crystal nucleation and aggregation. These stones may be asymptomatic or may present with infection, hematuria, or obstruction, necessitating prompt diagnosis and tailored management. Understanding the pathophysiology and risk factors associated with stone formation in ileal conduits is essential for improving long-term outcomes, guiding surveillance protocols, and selecting appropriate therapeutic strategies for this patient population.