[Microscopic hematuria : Reasonable and risk-adapted diagnostic evaluation]

Area of Science:

• Urology
• Nephrology
• Diagnostic Medicine

Background:

• Microscopic hematuria is a common finding, often incidental, prompting urological or nephrological evaluation.
• Underlying causes range from benign conditions to severe kidney and urinary tract malignancies.
• Prevalence is ~2% generally, rising to 30% in at-risk populations.

Purpose of the Study:

• To review diagnostic and follow-up strategies for microscopic hematuria.
• To provide recommendations for clinical evaluation practices.
• To highlight the need for evidence-based, risk-adapted diagnostic approaches.

Main Methods:

• Nonsystematic literature search focusing on urological and nephrological causes of hematuria.
• Consideration of national and international guidelines.
• Discussion of diagnostic and follow-up strategies.

Main Results:

• Medical or surgical intervention is needed in 13-35% of patients with microscopic hematuria.
• Malignant tumors are diagnosed in 2.6-4% of all patients and up to 25.8% in at-risk groups.
• Standard work-up includes history, physical exam, labs, and ultrasound; extended work-up with cystoscopy, cytology, and imaging is indicated for risk factors.

Conclusions:

• Evidence-based, risk-adapted diagnostic strategies for microscopic hematuria are currently unavailable.
• Development of reliable clinical and molecular markers is crucial for identifying high-risk patients.
• Improved diagnostic tools are needed for timely detection of severe diseases.