Positron emission tomography/computer tomography: Challenge to conventional imaging modalities in evaluating primary and metastatic liver malignancies

Figure 1 A 33-year-old man undergoing ascending colon cancer resection two years ago. Coronal PET image (A) also showing recurrent lesion (arrow head) at the root of mesentery, ¹⁸F-FDG PET (B) and PET/CT fused imaging (D) demonstrating multiple hepatic metastases (arrow), and non-enhanced CT (C) detecting fewer lesions than PET/CT fused imaging (D).

Figure 2 A 68-year-old male undergoing HCC resection 28-mo ago. Multiples bone metastases (arrow) on the image of whole body PET (A), non-enhanced CT (C) detecting no recurrence lesion in the liver, ¹⁸F-FDG PET (B) and PET/CT fused imaging (D) showing a high metabolism recurrent lesion (arrow head).

Figure 3 A 68-year-old female complaining of uncomfortable left upper abdomen for one month with increasing of CA19-9 (> 700 μ/L) (A), non-enhanced CT (C) detecting a low density lesion in the left lobe of the liver (white arrow), ¹⁸F-FDG PET (B) and fused imaging of PET/CT (D) showing necrosis (arrow head) in the center of the mass with a satellite lesion (black arrow). CC was confirmed by liver biopsy.