Figure 1. There is a hypodense mass lesion in the right lobe of the liver with several foci of low-grade metabolic activity (up to SUVmax 1.6, with background liver activity of SUVmax 0.9). On arterial phase imaging (not shown), multiple arterial enhancing foci were seen, with subsequent washout.

Figure 2. Arterial phase contrast-enhanced CT shows a hypervascular, arterial enhancing tumour at the resection margin and wash-out in the porto-venous phase (B). FDG-PET/CT did not show increased uptake (C).

Hepatoblastoma.

Hepatoblastoma is the commonest primary liver tumour in children, and the third commonest abdominal tumour in children. Accurate localization is important for biopsy purposes, and for appropriate management. The alpha-foetoprotein is frequently markedly raised, and also increases in cases of recurrence. The role of FDG PET/CT is not well-established due to limited experience. Anecdotal experience has found that tumours to have variable FDG-avidity.