Urine Cytology Findings in Analgesic Nephropathy

Abstract
Urine cytology screening for neoplasm led to the detection of 3 urothelial carcinomas and 1 severe urothelial dysplasia in 98 patients with analgesic-induced papillary necrosis. An additional 18 patients had changes suggesting that they were at risk of incurring malignancy in the near future. Routine urine cytology is recommended in all cases of analgesic nephropathy.