We started by analyzing the PD1/PD‐L1 mRNA expression across a combined cohort of patients from the WT and NBL TARGET (excluding Stage 4S NBL patients, as Stage 4S represents a distinct clinical entity with partly differing biology) cohorts and adult cancers from the TCGA pan cancer cohort, processed through a unified computational pipeline to ensure comparability.23 Here, CD274 is linked to cancer.