Balkan nephropathy (BN) has not been described in children; however, some previous studies in children from families with BN have revealed abnormalities of the urinary tract. In this study, urinary excretion of beta2-microglobulin, N-acetyl-beta-D-glucosaminidase (NAG) and gamma-glutamyl transpeptidase (GGT) was studied three times a year: spring, autumn, and winter, during a 3-year period, in 703 healthy children, initial age 9-13, from endemic and nonendemic settlements around the South Morava River. Beta-2-microglobulin excretion in urine, in all three seasons, was highest in children from families with BN compared with the excretion in children from the city, nonendemic villages, and those from nonendemic families.
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