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Figure 1. 60-year-old female patient with melanoma. (a) Axial PET and (b) fused image showing a focal fluorodeoxyglucose (FDG) uptake in the right lower abdomen, corresponding to the right ascending colon. (c) The axial low-dose CT scan shows some streaking of the pericolic fat in this region but no mass. (d) In the diagnostic CT with intravenous and oral contrast a vascularized tumour lesion could be clearly delineated (arrow) consistent with a bowel metastasis of melanoma (confirmed by histology).
