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M. SÁNCHEZ BAYLE, MD; C. RAMO MANCHEÑO, MD
Hospital Infantil "Nino Jesus" Jacinto Verdaguer, 26 (3° D) 28019 Madrid, Spain

Am J Dis Child. 1989;143(8):878-879.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

Sir.—Microhematuria is a common finding in pediatrics that frequently requires multiple diagnostic procedures¹ to determine its cause, which in many cases remains uncertain.

Among the multiple possible causes, Stapleton et al² pointed out the role hypercalciuria would play in the pathogenesis of certain types of microhematuria. We have found an association between hyperuricosuria and microhematuria in five otherwise-healthy children. We think that a pathogenic mechanism is operative that is similar to the one reported by Stapleton et al² for microhematuria secondary to hypercalciuria. The small number of patients tested only suggests this possibility and the pilot experience reported herein will require further investigation.

Patients and Methods.—Five children (2 boys and 3 girls), whose ages ranged from 4 to 9 years, were selected from a total of 139 patients with microhematuria because they presented abnormally high levels of uricosuria with no other underlying cause.

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