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Background and Objectives
The inhibition of the programmed death 1 (PD‐1)/its ligand 1 (PD‐L1) pathway may be associated with clinical responses in colorectal cancer (CRC). We aimed to characterize the transition of PD‐1/PD‐L1 expression through pulmonary metastasis (PM) and its clinical relevance.
Methods
This study retrospectively reviewed 50 patients who had curative resection of primary CRC...
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