[Urological emergency for cancer patients].

We summarized here the urological emergency status accompanied by cancer, such as urinary obstruction, bleeding and renal failure. Hydronephrosis occurs due to obstructive change and post-renal failure finally results after complete obstruction of bilateral ureters. Patients with obstructive disease are treated with percutaneous nephrostomy or indwelling double-J catheter. Bladder tamponade develops after bleeding of the urinary tract. Patients with bleeding are treated by bladder irrigation or transcatheter arterial embolization. Acute renal failure (ARF) includes pre-renal ARF, renal ARF and post-renal ARF, necessitating emergency hemodialysis. The emergency status can be often observed simultaneously, so careful examination and rapid treatment are necessary.