When asymptomatic microhaematuria is detected in a random urine sample, biohumoral or instrumental exams are not necessary.

Type of practice

Laboratory tests

Topic Area


The incidence of isolated microhaematuria in random urine testing is about 8% in children of 3 years of age; this percentage falls to 3-4% in schoolchildren. Nevertheless, in both of these paediatric age groups, the incidence of microhaematuria at subsequent urinalysis falls significantly to 0.7-1.5%. Second level exams are only recommended in the case of persistent microhaematuria and results should be considered in combination with medical history, clinical symptoms and erythrocyte morphology in order to guide investigations toward screening for glomerular or urologic diseases.


1. Takeshi Yanagihara, Riku Hamada, Kenji Ishikura, Osamu Uemura, Takeshi Matsuyama, Shori Takahashi, and Masataka Honda. “Urinary screening and urinary abnormalities in 3-year-old children in Japan”. Pediatr. Int (2015) Jun; 57 (3): 354–8.
2. Joo Hoon Lee, Hae-Won Choi, Yoon Jung Lee and Young Seo Park. “Causes and outcomes of asymptomatic gross haematuria in children”. Nephrology (2014) Feb; 19 (2): 101-6.
3. Deepa L. Sekhar, Li Wang, Christopher S. Hollenbeak, Mark D. Widome and Ian M. “A Cost-effectiveness Analysis of Screening Urine Dipsticks in Well-Child Care”. Pediatrics 2010 Apr; 125 (4); 660-3.

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