While we do not see changes in GM-CSF expression in the tumor, G-CSF expression is particularly associated with models causing extreme myeloid expansions [19], [30], and in these models blockade of G-CSF and not GM-CSF or M-CSF has been shown to decrease accumulation of Ly6G+ cells in tumors and lung metastases [19]. Here, CSF1 is linked to neoplasm.