Generally, the results of studies on the involvement of OXTR changes in cancer corroborate the conclusions presented in Section 4 and Section 5 (‘OXTR in Mental Disorders’ and ‘OXTR in Mucopolysaccharidoses’) that the efficiency of the expression of the OXTR gene rather than SNPs themselves result in the effective modulation of the disease course. The gene discussed is OXTR; the disease is mental disorder.