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Computed tomography (CT) image of a patient with EGFR-mutant non-small cell lung cancer demonstrating the metastatic burden of disease along with representative images of PD-L1 immunohistochemical staining of corresponding autopsy samples. Diffuse PD-L1 expression (≥50% of tumor cells expressing PD-L1) was identified in 8 distinct metastatic sites, but not in normal lung tissue.
