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Figure 7. Progression of lung adenocarcinoma to parahilar region in August 2018. The axial postcontrast chest CT image (A) reveals the radiation scar (broken arrow) continuous with the new large right parahilar mass (solid arrow) encasing the right mainstem bronchus; The corresponding soft tissue window image (B) shows the heterogeneous enhancement of the radiation scar (broken arrow) and the right parahilar mass (solid arrow). CT-guided biopsy of this lesion (not shown) demonstrated histology compatible with metastasis of the primary lung tumor