An immunohistochemical research with antibodies to the mutant p53 protein and a revelation of the human papilloma virus DNA 16 and 18 types via in situ hybridization at the histological sections of the urothelial carcinoma are realized. The material of 44 patients with the superficial bladder cancer (Ta and T1 stages) and with a presence of the indirect signs of the viral infection was studied. 16 patients were included in the group of high risk recurrence, 13 patients were included in the group of the mean risk, 15 patients were included in the group of the low risk. HPV DNA was revealed in 12 of 44 cases only in patients of the mean and high risk groups (5 and 7 cases, respectively); all the positive results in the high risk group were with the HPV 16 type probe. Evaluation of the p53 protein showed a significant increase of its expression in the mean and high risk groups. p53 protein expression mean value was 23,67% in the low risk group, 36,53% in the mean risk group, 53,43% in the high risk group. Presence of HPV DNA was associated with the high p53 expression in the vast majority of cases.
