Giant bladder stone presenting with renal failure 15 years after ileocystoplasty augmentation: A case report

A 68-year-old man with a history of ileocystoplasty performed 15 years prior presented with weakness and lethargy but no urinary symptoms. Despite the absence of typical complaints, imaging revealed a 10 × 9.8 cm giant bladder stone causing severe bilateral hydroureteronephrosis and renal failure. Following emergency dialysis, bilateral nephrostomy placement, and cystolithotomy, renal function recovered. This case highlights a giant stone within a bowel-segment urinary reservoir that caused silent obstruction and life-threatening renal failure, underscoring the need for lifelong follow-up after cystoplasty.