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A 70-year-old man underwent ¹⁸F-FDG PET/CT for evaluation of a pulmonary nodule. He also had a chest wall mass that was initially suspected to represent metastasis. PET/CT images demonstrated that the pulmonary nodule was hypermetabolic, consistent with lung cancer. In contrast, the chest wall mass showed only mild FDG uptake and was interpreted as a benign primary tumor. Pathological examination ultimately confirmed the pulmonary nodule as adenocarcinoma, whereas the chest wall mass was confirmed to be extramedullary hematopoiesis.
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Shi et al. (2026) studied this question.
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