title: [Antenatally detected hydronephrosis: practical approach for the pediatrician].
abstract: Approximately 1% of the fetuses present some dilatation of their urinary tract in utero. More than 50% of these antenatally detected hydronephrosis will disappear spontaneously after birth. The other 50% comprises ureteropelvic junction obstruction, vesico-ureteral reflux and primary megaureters. Postnatal radiological evaluation (renal ultrasonography and VCUG) is performed in every infant with a significantly dilated renal pelvis (> 8 mm between 20 and 30 weeks or > 10 mm after 30 weeks in utero). Renal nuclear scan should be done in every child with significant/worsening post-natal hydronephrosis. Antibioprophylaxis will be started from birth to prevent urinary tract infection. Medical or surgical approach will be chosen in the light of the uroradiological exam results and the clinical progress.
authors.affiliation: Unité romande de néphrologie pédiatrique, CHUV, Lausanne. Francois.Cachat@hospvd.ch
authors.forename: F
authors.initials: F
authors.lastname: Cachat
authors.forename: P
authors.initials: P
authors.lastname: Ramseyer
authors.forename: B J
authors.initials: BJ
authors.lastname: Meyrat
authors.forename: P
authors.initials: P
authors.lastname: Frey
authors.forename: A
authors.initials: A
authors.lastname: Boubaker
authors.forename: D
authors.initials: D
authors.lastname: Lepori
authors.forename: P
authors.initials: P
authors.lastname: Parvex
authors.forename: P
authors.initials: P
authors.lastname: Bugmann
authors.forename: E
authors.initials: E
authors.lastname: Girardin
mesh_terms: D005260:Female; D006801:Humans; D006869:Hydronephrosis / Q000175:diagnosis* / Q000209:etiology* / Q000628:therapy; D007231:Infant, Newborn; D007668:Kidney / Q000000981:diagnostic imaging; D007677:Kidney Function Tests; D011247:Pregnancy; D011296:Prenatal Diagnosis; D011877:Radionuclide Imaging; D014463:Ultrasonography; D014567:Urography