To investigate whether IL‐1α‐MPs would increase the recruitment of tumor infiltrating immune cells, tumors were harvested at Treatment Day 4 from a subset of mice (n = 3–4 mice/group) from saline, Blank MP, rIL‐1α (7.5 μg), and CPH:SA IL‐1α‐MPs (7.5 μg) treatment groups. This evidence concerns the gene IL1A and neoplasm.