In the entire cohort, CD8 + T-cell density showed a nonsignificant trend toward reduction in TTF-1-negative tumors.
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The expression of PD-1 ligands in the immune microenvironment was altered in TTF-1-negative lung adenocarcinoma.
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In the entire cohort, CD8 + T-cell density showed a nonsignificant trend toward reduction in TTF-1-negative tumors.