Prenatal diagnosis and management of hydronephrosis

Jason A. Pates, Jodi S. Dashe

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Congenital hydronephrosis is frequently amenable to prenatal diagnosis, often as early as the second trimester. Most clinicians use a renal pelvis anterior-posterior (AP) diameter of 4 mm or more prior to 20 weeks of gestation as a threshold for identifying pyelectasis. If mild dilation of the renal pelvis is an isolated finding in the second trimester, evaluation performed later in gestation is used to guide postnatal management. Since the normal renal pelvis dimensions may increase with advancing gestation, thresholds for the diagnosis are larger in the third trimester. Neonatal follow-up is typically recommended only if the fetal renal pelvis diameter exceeds a specified cut-off (e.g. 7 or 10 mm) at or beyond 34 weeks. If the measurement is less, most deem the pyelectasis physiologic or normal. However, it has been suggested that fetuses with early renal pelvis dilation that resolved during pregnancy might also benefit from postnatal surveillance. The newborn evaluation for hydronephrosis may be time consuming, invasive, and costly; however, it can often prevent sequelae from congenital uropathy.

Original languageEnglish (US)
Pages (from-to)3-8
Number of pages6
JournalEarly Human Development
Volume82
Issue number1
DOIs
StatePublished - Jan 2006

Fingerprint

Kidney Pelvis
Hydronephrosis
Prenatal Diagnosis
Pyelectasis
Pregnancy
Second Pregnancy Trimester
Dilatation
Third Pregnancy Trimester
Fetus

Keywords

  • Congenital
  • Fetal
  • Hydronephrosis
  • Pyelectasis

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health

Cite this

Prenatal diagnosis and management of hydronephrosis. / Pates, Jason A.; Dashe, Jodi S.

In: Early Human Development, Vol. 82, No. 1, 01.2006, p. 3-8.

Research output: Contribution to journalArticle

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