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Diagnostic ultrasound ( PDFDrive )

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A

B

FIG. 6.32 Distal Cholangiocarcinoma. (A) Polypoid solid intraductal mass (arrow) within the distal common bile duct, causing ductal obstruction.

(B) Corresponding contrast-enhanced image demonstrates internal enhancement (arrow), proving a vascularized tumor.

A

B

C

D

FIG. 6.33 Metastases to the Biliary Tree: Spectrum of Appearances. (A) Entirely intraductal echogenic mass obstructing left lobe of liver.

(B) Periductal/duct wall iniltration (arrowheads) with obliteration of the left hepatic duct. (C) Poorly deined hilar tumor with ductal obstruction.

(D) Echogenic intraductal tumor (arrow) within the extrahepatic ducts. In all cases, tumor mimics cholangiocarcinoma. The diagnosis in all four

images was metastatic breast carcinoma.

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