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Upper thoracic esophageal cancer. (a) Axial fused FDG PET-CT axial image demonstrates a single hypermetabolic low right level 3 cervical node (white arrowhead); (b) Axial fused FDG PET-CT image shows that the primary tumor is a hypermetabolic eccentric mass in the upper thoracic esophagus (white arrow). Upper esophageal tumors frequently have nodal spread to the low neck or supraclavicular region.
