Urine cytology as a screening method for transitional-cell carcinoma in dialysis patients with analgesic nephropathy.

The abuse of analgesic-containing drugs leads to chronic nephropathy with an increased risk of developing a transitional-cell carcinoma of the urinary tract. In our experience follow-up is often stopped or has never been started when patients present for dialysis. We use urine cytology as the screening method. Nine of the 138 patients entering dialysis between 1980 and 1990 had analgesic nephropathy. In three patients urine cytology led to a suspicion of malignancy. Cystoscopy and/or retrograde pyelography showed a carcinoma of the renal pelvis in two patients and a carcinoma of the bladder in one patient. The patients with carcinoma of the renal pelvis died of cardiovascular complications within 2 years of nephroureterectomy. An autopsy was performed in one of these patients and there were no residual tumours or metastases. In the other patient autopsy was not performed, but urine cytology again suggested malignancy. The patient with a carcinoma of the bladder is still alive. She was treated with transurethral resection of the tumour and etoglucide instillations. We conclude that urine cytology is a good screening method for the early detection of transitional-cell carcinomas in dialysis patients with analgesic nephropathy.