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Diagnostic ultrasound ( PDFDrive )

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CHAPTER 7 The Pancreas 239

A

B

TRANS

C

FIG. 7.64 Varying Locations of Pancreatic Carcinoma. (A)

Transverse sonogram shows a hypoechoic pancreatic head

mass (arrow) resulting in obstruction of the common bile duct

(CBD). (B) Transverse sonogram shows a hypoechoic mass

replacing the pancreatic tail. (C) Transverse sonogram shows

diffuse pancreatic carcinoma; less than 5% of all ductal adenocarcinomas

are diffuse.

CBD

M

FIG. 7.65 Large Pancreatic Carcinoma. Longitudinal oblique sonogram

shows large, hypoechoic mass (M) obstructing the extrahepatic

common bile duct (CBD).

FIG. 7.66 Pancreatic Carcinoma. Transverse sonogram shows

hypoechoic mass (arrow) obstructing the pancreatic duct. Note the

“beaded” pattern of the dilated, obstructed duct. Ao, Aorta; IVC, inferior

vena cava.

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