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. 2025 Apr 25;16:1564834. doi: 10.3389/fphar.2025.1564834

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Copyright © 2025 Huang, Xia, Yang, Lin, Luo, Li and Chen.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Imaging, Histopathology and Molecular Diagnostics. Initial tumor sizes at diagnosis on (A) CT, (B) MRI, and (C) PET-CT. (D) Histopathological characterization of the tumor, with immunohistochemical staining showing positivity for cytokeratin (CK) (left panel, magnification ×40), TTF-1 (middle panel, magnification ×100) and Napsin A (right panel, magnification ×200), indicative of pulmonary adenocarcinoma origin.