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 in the diagnosis of biliary atresia1,2.
This sign is useful in the evaluation of infants with cholestatic jaundice, helping for 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.
- 1. McGahan JP, Goldberg BB. Diagnostic ultrasound. Informa Health Care. (2008) ISBN:1420069780. Read it at Google Books - Find it at Amazon
- 2. Lee HJ, Lee SM, Park WH et-al. Objective criteria of triangular cord sign in biliary atresia on US scans. Radiology. 2003;229 (2): 395-400. doi:10.1148/radiol.292020472 - Pubmed citation
- 3. Donnelly LF. Pediatric Imaging. Saunders. (2009) ISBN:1416059075. Read it at Google Books - Find it at Amazon