The PAS score was significantly negatively correlated with the expression of several immune checkpoint genes, including BTLA, CD27, CD48, etc. Interestingly, there was a strong positive correlation between the PAS score and CD274 (PD‐L1), suggesting that the high‐PAS group might have activated potential PD‐L1‐mediated immune evasion, thus promoting tumour progression. Here, BTLA is linked to neoplasm.