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Positron emission tomography (PET) images of the patient on initial presentation and following recurrence of an eccrine porocarcinoma four years later. (A) Positron emission tomography (PET) scan, performed at initial presentation, shows no uptake in the brain or skull. (B) PET scan performed four years later shows hypermetabolic activity in an infiltrative soft tissue mass in the right posterior sub-occipital region.
