IL17A and neoplasm: Il17−/− mice had reduced lung tumor numbers, as well as reduced tumor cell proliferation, angiogenesis, myeloid cell recruitment and expression of pro-inflammatory mediators (Il6, Cxcl2, Ccl2, Arg1, Csf3, Mmp7, Mmp12 and Mmp13) compared to Il17+/+ mice (Fig. 6).