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Question 3
Is ultrasonography required to rule out congenital anomalies of the kidneys and urinary tract in babies with isolated preauricular tags or sinuses?
  1. Andrew James McArdle1,
  2. Rukshana Shroff2
  1. 1Infectious Diseases and Microbiology Unit, Institute of Child Health, London, UK
  2. 2Department of Nephrology, Great Ormond Street Hospital, London, UK
  1. Correspondence to Dr Andrew James McArdleInstitute of Child Health, 30 Guilford Street, London WC1N 1EH, UK; andrew.mcardle{at}

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While performing an examination of a newborn, you note a preauricular sinus (PAS). The examination is otherwise unremarkable. A colleague suggests a need for renal ultrasonography in infants with a PAS or preauricular tag (PAT), but your consultant tells you this is unjustified. You decide to search for evidence to inform your clinical decision.

Structured clinical question

Do infants with isolated PAT or PAS (population) have a higher incidence of congenital anomalies of the kidneys and urinary tract (CAKUT) (outcome) on ultrasound (intervention) than infants without (controls)?

Search strategy and outcome

Secondary sources

Cochrane Library (21 August 2012)—preauricular OR ‘pre-auricular’—16 results of which none were relevant.

Primary sources

Pubmed (21 August 2012)—(‘pre-auricular’ OR preauricular OR ‘Ear/abnormalities’(MeSH)) AND (kidney OR renal OR urinary OR genitourinary OR ‘Kidney/abnormalities’(MeSH) OR ‘Kidney/ultrasonography’(MeSH) OR ‘Urinary Tract/abnormalities’(MeSH) OR ‘Urinary Tract/ultrasonography’(MeSH)).

Five hundred and forty-two articles were found. Titles and/or abstracts were reviewed to identify …

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  • Competing interests None.

  • Provenance and peer review Not commissioned; externally peer reviewed.