We thus chose to focus on evaluating PD1/PD‐L1 expression, the numbers of expressed neoantigens, as well as CD8+ TILs (tumor‐infiltrating lymphocytes) in the two most common extracranial solid tumors in children, Wilms' tumor (WT), and neuroblastoma (NBL). The gene discussed is CD8A; the disease is Wilms tumor.