A Pediatric Radiology textbook and Pediatric Radiology digital library
Biliary Atresia
Etiology: congenital absence of biliary tree
US: gallbladder is small to absent, triangular cord sign = bile ductal remnant in porta hepatis, hypertrophied hepatic artery
HIDA scan: pretreat with phenobarbital 1 week to optimize liver uptake, decreased uptake of radiotracer in liver, no excretion of radiotracer into biliary tree or bowel