A 64-year-old man presents to the sonography department for
a right upper quadrant sonogram. He is complaining of abdominal pain, weight
loss, and pruritus. Sonographically, you visualize an area of dilated ducts
that abruptly end. What is the most likely diagnosis?
a. Biliary atresia
b. Choledocholithiasis
c. Caroli syndrome
d. Cholangiocarcinoma
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