Figure 3.

(a) Maximum intensity projection image of whole body PET-CT shows FDG avid primary gastric tumor (single arrow). FDG avid filling defect in portal venous system in branching pattern (double arrow) indicates malignant portal venous tumor thrombus. (b) Contrast-enhanced CT scan in venous phase shows portal venous system at bifurcation is filled up with thrombus. (c) Fused PET-CT image in axial section through the same plane shows branching thrombus with intrahepatic extension in both lobes of the liver. Both the thrombus as well as gastric mural lesion show high grade metabolic activity confirming the tumor thrombus in portal vein. FDG: Fluorodeoxyglucose, PET-CT: Positron emission tomography-computed tomography