Therefore, IL-4 protein expression was significantly higher in animals aged ≤ 10 years (p < 0.0001) and animals with tumor time course of less than six months (p = 0.04); moderate tumor vascularization (p = 0.03); tumor mass size of less than three centimeters (p = 0.001); no metastasis (p = 0.01); no recurrence (p = 0.02); and clinical stage I or II (p = 0.008) and animals that were still alive at the end of the followup period (p = 0.005) (Figure 2(b)). This evidence concerns the gene IL4 and neoplasm.