IL17A and neoplasm: The regulation of immune response can influence tumor progression by altering the balance between pro-inflammatory and anti-inflammatory cytokines.10 For example, certain bacterial species possess the capacity to stimulate the production of pro-inflammatory cytokines, such as interleukin-17 (IL-17), which can participate in both tumor development and metastasis, through the recruitment of tumor-associated macrophages and neutrophils.26