In this study, we present the results of determinations of VEGF-A, VEGF-R2, and FGF-2 in the plasma of patients with cerebral glioma in all four grades and in a control group, and results of quantitative analysis of VEGF-A and FGF-2 in the serum of children with acute lymphoblastic leukemia and in a control group. The gene discussed is FGF2; the disease is acute lymphoblastic leukemia.