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Metastatic Merkel cell carcinoma. (a) Axial FDG PET-CT image of the head. The primary tumor in the skin of the left temple (white arrowhead) is small but metabolically active. (b) Axial FDG PET-CT of the upper abdomen shows multiple tiny hypermetabolic liver metastases (white arrow. (c) Axial FDG PET-CT of the mid-abdomen shows a large portocaval metastatic hypermetabolic nodal conglomerate and a small right retrocrural node (white arrowheads).
