Triangular cord sign (biliary atresia)

The triangular cord sign is a triangular or tubular echogenic cord of fibrous tissue seen in the porta hepatis at ultrasonography and is relatively specific for the diagnosis of biliary atresia 1,2.

This sign is useful in the evaluation of infants with cholestatic jaundice, helping in the differential diagnosis of biliary atresia from neonatal hepatitis.

It is defined as more than 4 mm thickness of the echogenic anterior wall of the right portal vein (EARPV) measured on a longitudinal ultrasound scan 2

Article information

rID: 21607
Section: Signs
Synonyms or Alternate Spellings:
  • Triangular cord appearance
  • Echogenic anterior wall of the right portal vein
  • Triangular cord sign: biliary atresia

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Cases and figures

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  • Case 2
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