Cancer Prevalence and Risk Stratification in Adults Presenting With Hematuria: A Population-Based Cohort Study

Area of Science:

• Urology
• Oncology
• Diagnostic Imaging

Background:

• Hematuria, a common presenting symptom, can indicate serious genitourinary pathology.
• Differentiating between asymptomatic microhematuria (AMH) and symptomatic microhematuria (SMH) is crucial for risk stratification.

Purpose of the Study:

• To determine the prevalence of renal cell carcinoma (RCC) and urothelial carcinoma (UC) in patients presenting with gross hematuria, AMH, and SMH.
• To evaluate the utility of current diagnostic work-ups based on hematuria type and patient age.

Main Methods:

• Population-based retrospective descriptive study of 4453 Olmsted County residents with initial hematuria episodes (2000-2010).
• Patients categorized by gross hematuria (1487), AMH (2305), and SMH (661).
• Prevalence of RCC, upper urinary tract UC (UT-UC), and lower urinary tract UC (LT-UC) calculated for each group.

Main Results:

• Prevalence of RCC/UC was low across all hematuria types: Gross hematuria (RCC 1.3%, UT-UC 0.8%, LT-UC 9.0%), AMH (RCC 0.2%, UT-UC 0.3%, LT-UC 1.6%), SMH (RCC 0.6%, UT-UC 0.2%, LT-UC 0.3%).
• Age was identified as the most significant risk factor for any type of hematuria.
• Cancer prevalence was notably lower in younger patients.

Conclusions:

• The prevalence of RCC and UC in patients with AMH and SMH is generally low.
• Current extensive diagnostic work-ups (e.g., cystoscopy, CT urography) may be overutilized.
• Stratifying diagnostic approaches by hematuria type and patient age could optimize resource allocation and reduce patient burden.