Resumen

DIAZ ALVAREZ, Manuel et al. Imaging and clinical follow-up of newborns diagnosed with pyelectasia. Rev Cubana Pediatr [online]. 2010, vol.82, n.3, pp. 1-12. ISSN 1561-3119.

INTRODUCTION. The aim of present research was to determine the imaging significance and course of the pyelectasia in newborns with this diagnosis. METHODS. A prospective, retrospective and descriptive study was conducted in 261 newborns diagnosed with pyelectasia, seen in the Neonatology consultation of the "Juan Manuel Márquez" Children and University Hospital from 1995 to 2007. The statistical methods used were the absolute frequencies and the percentage figures, mean and quartiles. Also, the ratio difference test was applied. Patients were assessed according clinic and by radioimage studies to specify exactly the cause and course of pyelectasia. RESULTS. There was predominance of pyelectasia diagnosed during the postnatal stage (52,1%) versus the prenatal one. The prenatal pyelectasia was confirmed after birth in the 93,6% of cases. Most of children had a slight dilatation (73,5%) and mainly the left unilateral. The pyelectasias non-associated with anomalies of urinary tract had generally a transient course and disappeared during the first months of life (disappearance mean: 6 months); in some children this condition remained (follow-up mean: 17,5 months). The more frequent anomaly of the urinary tract was the vesicoureteral flow and in a significant way when diagnosis pyelectasia was made during the postnatal stage. CONCLUSIONS. The pyelectasia is found by prenatal screening or by postnatal assessment. These pyelectasias generally are transient and disappear in a variable follow-up time but also they may be the expression of the presence of some anomaly of the urinary tract, more commonly due to vesicoureteral reflux. Authors recommended the continuous clinical and long-term follow-up of these patients.

Palabras clave : Newborn; pyelectasia; hydronephrosis; urinary tract infection; vesicoureteral reflux; prenatal screening.

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