In univariate analyses, stromal PD-1+ immune cell infiltration, tumour CD8+ immune cell infiltration, stromal CD8+ immune cell infiltration, stromal CD3+ immune cell infiltration, combined tumour and stromal CD8+ immune cell infiltration, combined stromal infiltration of PD-1+ and CD8+ immune cells and combined stromal PD-L1+ and CD8+ immune cell infiltration were associated with DCB in the ACT biopsy group. This evidence concerns the gene PDCD1 and neoplasm.