[Value of urine cytology in the diagnosis of tumors of the kidney pelvis].

Based on case report the value of urine cytology after renal pelvis lavage for the definite diagnosis of a renal pelvis carcinoma is demonstrated. The exact preoperative differential diagnosis permits a radical operative procedure without intraoperative tumor exposure decreasing the danger of spread of tumor. The simple and inexpensive technique should be applied in the urologic practice more often.