An abdominal sonogram is ordered on an infant in the
intensive care unit who is suffering from jaundice and fever. Sonographically,
you visualize a cystic mass within the common bile duct that is causing a focal
enlargement. This is most suggestive of:
a. Cholangiocarcinoma
b. Mirizzi syndrome
c. Choledochal cyst
d. Biliary atresia
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