[Vesicoureteral reflux in the first year of the life (author's transl)].

A group of 50 children in the first year of life with vesicoureteric reflux (VUR) has been followed-up for a period of two-eleven years. VUR has been classified in four grades according to Hertz's criteria. Clinical evolution and renal scarring have been related to the degree of VUR. The absence of urinary tract infection (UTI) influences disappearance of the VUR grade 3 but does not influence the disappearance of VUR grade 2. There is a statistically significant correlation between renal scarring, the degree of VUR and renal growth. UTI influences renal growth in scarred kidneys with VUR grade 3. No scars have been seen in previously normal kidneys in the first radiological examination.