Renal failure in a neonate with posterior ureteral flaps, a case report Falla renal en paciente neonato con valvas posteriores. Reporte de caso
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© 2018 Sociedad Mexicana de Pediatria. All rights reserved. The most common cause of lower urinary tract obstruction in males is posterior ureteral flaps; its incidence is between 1-in 5,000 to 8,000 male births. This malformation may be detected from the second trimester of pregnancy and the prognosis depends on the severity of the obstruction and the renal failure. Case report: This was a male neonate, product of the sixth gestation with adequate prenatale care, at the sixteenth gestational age megacystis was detected in a prenatal ultrasound. On the 33rd gestational week, posterior ureteral flaps were diagnosed. He was born prematurely at 34 weeks of gestation with respiratory distress and was admitted to the NICU. Since he was admitted to NICU, hyperkalemia and elevated creatinine levels were determined, which gradually increased. Antihyperkalemic treatment was started without needed dyalsis. Cystostomy was done and he was discharged at 40 days of postnatal life with oral sodium bicarbonate, furosemide and weekly erythropoietin. Conclusions: Patients with posterior flaps have a fetal mortality of 30 to 50%. The presentation of our patient is rare, since most have renal failure at older ages and not during the neonatal period.