CD8A and neoplasm: Remarkably, the tumor size of the 3H3-Ctnnb1Δex3 cells was larger than that of the 3H3-Ctrl cells (Supplementary Fig. 5), and immunohistochemical analysis revealed decreased CD8+ T cell infiltration in the tumor tissue of the 3H3-Ctnnb1Δex3 cells (Fig. 7a).