Abstract
The aim of the study was to investigate the significance of different prognostic factors and long-term renal outcome in boys with posterior urethral valves (PUVs) detected either antenatally or during infancy. A total of 46 cases of PUVs, 23 antenatal and 23 postnatal, were followed prospectively from 1983 to 2003. The mean follow-up time was 12.5 years. The impact of vesicoureteral reflux (VUR), urinary tract infections (UTIs), urinary continence, and renal parenchymal damage on patient outcome was evaluated. Long-term renal outcome was defined as favorable if renal function was either normal or moderately impaired (glomerular filtration rate ≥60 ml/min per 1.73 m2) and poor if the patient had either chronic renal failure or end-stage renal disease. The outcome was poor in 14 (30%) of the 46 boys and was associated with a significantly higher nadir serum creatinine concentration (mean 157 μmol/l) during the 1st year of life (P<0.001), with bilateral VUR (P<0.05) and breakthrough UTIs (P<0.05). In our patients, age at achieving urinary continence, and the presence of renal parenchymal damage did not have a statistically significant association with long-term renal outcome. The long-term outcome among boys with antenatally detected PUVs did not differ from that among those cases detected postnatally after developing symptoms (P=0.25).
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This study was financially supported by the Medical Research Fund of Tampere University Hospital and by a research grant from Helsinki University Central Hospital.
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Ylinen, E., Ala-Houhala, M. & Wikström, S. Prognostic factors of posterior urethral valves and the role of antenatal detection. Pediatr Nephrol 19, 874–879 (2004). https://doi.org/10.1007/s00467-004-1474-4
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DOI: https://doi.org/10.1007/s00467-004-1474-4