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Figure 5. Metastasis of lung adenocarcinoma to paratracheal lymph node in April 2018. The axial PET/CT image (A) shows a hypermetabolic left paratracheal lymph node (arrow); The corresponding coronal PET/CT image (B) shows the hypermetabolic lymph node (arrow), as well as the treated segment 8 lesion (arrowhead); H&E stain (400x) of the lymph tissue obtained by fine-needle aspiration (C) reveal sheets of pleomorphic cells with mucin production. This is the same morphology of lung adenocarcinoma seen on prior lung biopsy, thereby consistent with a metastasis from the lung primary tumor