Diagnostic Approach for Hematuria

Initial Evaluation and Risk Stratification

The American College of Radiology recommends renal and bladder ultrasound as the first-line imaging for children with isolated nonpainful, nontraumatic hematuria 4
Patients with high-risk features, including age >40 years, smoking history, and gross hematuria, require urgent urologic evaluation due to increased risk of malignancy 1, 2, 3
The presence of dysmorphic RBCs (>80%), red cell casts, significant proteinuria (>500 mg/24 hours), and elevated serum creatinine indicates a glomerular source of hematuria 1, 2
The American College of Radiology suggests that CT urography is the preferred imaging modality for comprehensive evaluation of the upper urinary tract in patients with hematuria 2

Patients with non-glomerular hematuria or no identified benign cause should be referred to urology for cystoscopy and imaging to rule out malignancy 1, 2
Voided urine cytology should be obtained at initial evaluation and follow-up intervals for patients with persistent microscopic hematuria 3
Repeat urinalysis, voided urine cytology, and blood pressure monitoring are recommended at 6, 12, 24, and 36 months for patients with negative initial evaluation 1, 3

Gross hematuria requires immediate urologic referral due to high malignancy risk (>10%) 1
Patients with isolated glomerular hematuria require follow-up checks at regular intervals due to elevated risk for progressive renal disease 1, 3
The American Academy of Pediatrics and the American College of Radiology recommend against the use of CT for initial evaluation in children with isolated hematuria without proteinuria 4