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[Microscopic hematuria of postrenal origin]
1Département de chirurgie, Hôpital cantonal universitaire, Genève.
Schweizerische Medizinische Wochenschrift
|December 12, 1987
Summary
Screening for urologic disease using microscopic hematuria is not highly effective, with a low cancer detection rate. Early detection of tumors via hematuria screening may not significantly improve survival, except for microinvasive bladder cancer.
Area of Science:
- Urology
- Epidemiology
- Diagnostic Screening
Context:
- Microscopic hematuria is a common finding in urine.
- Its utility as a screening tool for serious urologic conditions requires careful evaluation.
Purpose:
- To assess the diagnostic value of monosymptomatic microscopic hematuria (MMH) as a screening test for urologic diseases.
- To determine if early detection through MMH screening impacts patient survival rates.
Summary:
- MMH screening in an unselected population yields a low diagnosis rate for serious urologic disease (approx. 5%) and tumors (below 1%).
- Dip-stick and microscopic evaluation methods show no significant difference in results.
- Factors like symptom grade, duration, and patient age do not reliably identify individuals at higher risk.
- A significant percentage (10%) of MMH cases remain unclassified, highlighting diagnostic uncertainty.
- Early detection of renal or bladder tumors via MMH screening does not consistently improve survival.
- Delayed treatment has a proven detrimental effect only for microinvasive bladder cancer.
Impact:
- Highlights limitations of MMH as a widespread screening tool for urologic malignancies.
- Suggests a need for more targeted screening strategies based on risk factors rather than isolated hematuria.
- Informs clinical practice regarding the interpretation of microscopic hematuria and subsequent diagnostic workup.