[Prognostic study of cell proliferative markers ki67, PCNA and p53 oncoprotein in bladder tumors]

We report a study of cell proliferative factors Ki67, PCNA and p53 oncoprotein in 55 patients with bladder tumors. Fifty-three of the patients were male and two were female, with a mean age of 56.6 and 68.5 years, respectively. These tumors were of transitional cell type in 97.9% of the cases. Staging was, respectively, pTis (4.76%), pTa (30.9%), pT1 (19.04%), pT2 (23.8%) and Pt3 (21.4%). Our study of proliferative nuclear markers Ki67 showed that cell proliferation increased in bladder tumors according to grade in the same stage. This variation was highlighted by our results for PCNA but was not verified for Ki67. However, these results revealed an increase of cell proliferation for a same grade (grade I and II) in different stages (pTa, pT1, pT2) for PCNA; this was not ascertained for Ki67. The study of p53 oncoprotein showed that detection of mutated p53 protein increased according to grade only for grades II and III and to stage only when moving from pTis to superficial tumors (pTa, pT1) and to deep tumors (pT2, pT3), thus individualizing two groups without significant variation within these groups. A variation according to grade in the same stage was noted only for stages pT1 and pT2. A variation for a same grade (grades II and III) was reported between stages pTa, pT1 and pT2. The combined study of Ki67, PCNA and p53 oncoprotein showed a prognostic correlation between these three markers in general.