Unilateral renal agenesis diagnosed on early prenatal transvaginal scans

Osnat Zmora*, Ron Beloosesky, Ayala Gover, Moshe Bronshtein

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Background: Unilateral renal agenesis is a rare finding. There are no large-scale studies reporting this finding in early pregnancy. Objectives: To evaluate the incidence of unilateral renal agenesis (URA) and of associated anomalies diagnosed by early prenatal transvaginal sonography. Methods: We performed a retrospective chart review of all 59,382 transvaginal scans performed at 14-16 weeks gestation by a single operator at different clinics during the period 1994-2013. Results: The incidence of URA was 1:1212 (49/59382 cases). Associated anomalies were diagnosed in 22 cases (45%). Renal anomalies were diagnosed in 22.4%. Extra-renal anomalies (with exclusion of a single umbilical artery or nuchal edema as isolated findings) were diagnosed in 24.5%. Ambiguous genitalia were diagnosed in 8.2%. Conclusions: URA is a rare finding in early transvaginal sonography. Associated anomalies are common and should be sought.

Original languageEnglish
Pages (from-to)85-87
Number of pages3
JournalIsrael Medical Association Journal
Issue number2
StatePublished - Feb 2019


  • Associated anomalies
  • Early prenatal scans
  • Incidence
  • Unilateral renal agenesis (URA)


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