Cutaneous incidentaloma revealed by [18 F]-FDG-PET/CT.

[18 F]-fluorodeoxy-D-glucose (FDG) positron emission tomography-computed tomography (PET/CT) is a nuclear imaging technique that uses intravenously injected FDG and could be useful for the staging or restaging of various malignancies, or for assessments of therapeutic responses.1 Because FDG accumulation depends on the transport of glucose into cells, FDG uptake occurs not only in malignant tumours, but also in inflammation, infection, and benign tumours.2 Benign cutaneous lesions that are discovered incidentally from the accumulation of FDG are called "incidentalomas", and they are rarely reported. Such uptake should be differentiated from metastatic skin tumours, especially in patients with a history of malignancy.