Figure 1A. Axial contrast-enhanced abdominal CT scan (acquired 1 week before the PET/CT study) shows thickened wall at the site of the primary adenocarcinoma in the proximal ascending colon (blue arrow).

Figure 1B. Axial concurrent abdominal CT study (oral contrast given) obtained at a similar level as in Figure 1A (acquired in conjunction with the PET scan) shows similar findings.

Figure 2. Axial contrast-enhanced abdominal CT scan (acquired near the dome of the liver, in liver window) shows small low-density lesions (orange arrows). These are not seen in the concurrent axial abdominal CT (in soft tissue window) study acquired at a similar level as in Figure 2B (intravenous contrast not given).

Figure 3. Axial contrast-enhanced CT scan (obtained at the level of the gallbladder, in liver window) shows an equivocal low-density lesion in the posterior right hepatic lobe (orange arrow). This is not definitely evident in the axial concurrent CT study obtained at a similar level as in Figure 3B.

Figure 4. Anterior projection image of an FDG-PET study depicts focal intense FDG uptake at the site of the primary tumor (blue arrow) and multiple focal areas of increased FDG activity throughout both lobes of the liver (orange arrows). Prominent right renal collecting system activity is evident (activity immediately superior to blue arrow).

Figure 5. Lateral projection image of an FDG-PET study demonstrates focal intense FDG uptake at the site of the primary tumor (blue arrow) and multiple focal areas of increased FDG activity throughout both lobes of the liver (orange arrows) with prominent right renal collecting system activity superior and posterior to the primary tumor.

Figure 6. Cine format of the FDG-PET projection images.

Figure 7. Axial FDG-PET study (acquired at the same level as in Figure 1B), delineates intense FDG uptake at the site of the primary tumor (blue arrow).

Figure 8. Fusion image of an axial FDG-PET study (Figure 7) and an axial CT scan (Figure 1B) demonstrates the same findings as in Figure 7.

Figure 9. Axial FDG-PET study (obtained at the same level as in Figure 2B), depicts multiple foci of increased FDG uptake predominantly in the left lobe of the liver (some are indicated by the orange arrows). A number of these foci may correspond to the small lesions seen in Figure 2A.

Figure 10. Fusion image of an axial FDG-PET study (Figure 9) and an axial CT scan (Figure 2B) demonstrates the same findings as in Figure 9.

Figure 11. Axial FDG-PET scan (acquired at the same level as in Figure 3B) delineates 2 foci of increased FDG uptake in the right lobe of the liver (orange arrows). The posterior focus corresponds to the equivocal low-density area seen in the previous contrast-enhanced CT in Figure 3A.

Figure 12. Fusion image of an axial FDG-PET study (Figure 11) and an axial CT scan (Figure 3B) depicts the same findings as in Figure 11.