[Malignant cells in voided urine from elderly men contacted by mail]

Area of Science:

• Urology
• Oncology
• Diagnostic Cytology

Context:

• Elderly men in urban settings are a demographic for bladder cancer surveillance.
• Urine cytology is a non-invasive method for detecting urothelial abnormalities.

Purpose:

• To evaluate the impact of introducing urine cytology screening for bladder cancer in elderly men.
• To assess the diagnostic accuracy and clinical utility of urine cytology in this population.

Summary:

• Introducing urine cytology screening in elderly men increased detected bladder cancer cases from 1.7 to 3.7 per 1,000. This resulted in overdiagnosis, with five men undergoing unnecessary cystoscopies.
• The newly diagnosed cases (three) did not show significant improvements in malignancy grade or tumor stage.
• Cytological validity showed a sensitivity of 0.5, specificity of 0.96, and a low predictive positive value (0.14 overall, 0.54 for positive cytology).

Impact:

• The study indicates that while urine cytology can increase bladder cancer detection rates, its current application in this screening setting leads to overdiagnosis and questionable clinical benefit.
• Findings suggest a need for refining urine cytology interpretation and follow-up protocols to improve its positive predictive value and clinical utility in bladder cancer screening.