Pyocystis: two case reports of patients in renal failure.

Two cases of pyocystis in patients in end-stage renal disease are reported. Pyocystis is a recognized complication of urinary diversion procedures, but also occurs in anuric or oliguric hemodialysis patients. The treatment differs from ordinary cystitis, requiring catheterization, bladder irrigation, and intravesical antibiotic instillation. When undiagnosed, pyocystis may progress to sepsis and death.