Triangular Cord Sign in Extrahepatic Biliary Atresia
Objective criteria of triangular cord sign in biliary atresia on US scans.
Thickness of the echogenic anterior wall of the right portal vein (EARPV) is measured. The TC sign was defined as thickness of the EARPV of more than 4 mm on a longitudinal scan. Biliary atresia was diagnosed when the TC sign was present.
Mean thickness of the EARPV was significantly greater in patients with biliary atresia (5.39 mm) than in patients with neonatal hepatitis (2.17 mm) (P <.05). Use of 4-mm thickness as the criterion for TC sign was statistically significant (P <.05), resulting in a sensitivity of 80%, specificity of 98%, and positive and negative predictive values of 94% for the diagnosis of biliary atresia.
An objective criterion of the TC sign is an EARPV thicker than 4 mm on a longitudinal scan.
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Triangular Cord Sign in Extrahepatic Biliary Atresia Reviewed by Sumer Sethi on Saturday, August 27, 2005 Rating: