We performed immunohistochemical (IHC) staining of IL-17 and AFP in surgically resected tumor tissues of 4 patients, and discovered that IL-17 and AFP were not homogeneously distributed in all patients we evaluated; rather, tissue of some patients showed signal of IL-17 but not AFP, while others showed signal of AFP but not IL-17. The gene discussed is IL17A; the disease is neoplasm.