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Figure 3-3. A patient with carcinoma of the pancreas. (A) Screening CT scan of the pancreas shows a hypodense mass (M) at the body of the pancreas. It is not clear whether the superior mesenteric artery or vein is involved. (B) Multiphasic helical CT scan obtained at 2.5-mm slice thickness shows the mass (M) involving the superior mesenteric vein (arrow).

Figure 3-3. A patient with carcinoma of the pancreas. (A) Screening CT scan of the pancreas shows a hypodense mass (M) at the body of the pancreas. It is not clear whether the superior mesenteric artery or vein is involved. (B) Multiphasic helical CT scan obtained at 2.5-mm slice thickness shows the mass (M) involving the superior mesenteric vein (arrow).

Figure 3-3. (continued) (C) CT scan 1 cm above the level in B shows involvement of the splenic artery (curved arrow). (D) Image display in the coronal oblique plane shows tumor (T) involvement of the hepatic artery (arrow), splenic artery (curved arrow), and superior mesenteric vein (arrowhead), making the tumor unresectable.

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