Pseudo-Acute Kidney Injury Caused by a Radiation-Induced Bladder Rupture

We report a case of pseudo-acute kidney injury (AKI) caused by a bladder rupture following chemoradiotherapy for uterine cancer. Bladder perforation can lead to urinary ascites, resulting in elevated renal function parameters via peritoneal reabsorption. Owing to nonspecific symptoms, this condition is often difficult to differentiate from true AKI or acute abdomen. In our case, although temporary hemodialysis was initiated, the renal parameters improved after urethral catheter drainage. A bladder rupture should be suspected early in patients with a history of pelvic radiotherapy who present with ascites and renal dysfunction.