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Correlation of lymphocyte densities between the colorectal primary tumor and liver metastases. (A,B) Correlation of CD8+ T cells in the CT and IM between colorectal primary tumors and liver metastases. (C,D) Correlation of CD8+ T cells in the CT and IM between colorectal primary tumors and liver metastases. CT, core tumor; IM, invasive margin.
