Elsevier

Human Pathology

Volume 24, Issue 5, May 1993, Pages 469-476
Human Pathology

Original contribution
Immunohistochemical detection of p53 protein in mammary carcinoma: An important new independent indicator of prognosis?

https://doi.org/10.1016/0046-8177(93)90158-DGet rights and content

Abstract

In an immunohistochemical pilot study of 195 primary breast cancer patients with a 10-year median follow-up we found that patients with carcinomas who express p53 protein in the majority of their tumor cells (19% of the cases) have a considerably worse prognosis than those who do not. The effect of the presence of the protein is seen on disease-free interval (chi-square, 11,69; P < .001), overall survival (chi-square, 19.68; P < .001), and survival after relapse (chisquare, 4.93; P < .02), and is seen in node-negative (chi-square, 6.99; P < .009) and node-positive (chi-square, 13.05; P < .001) patients. Furthermore, the effect is most apparent in patients with infiltrating lobular and grade II infiltrating ductal carcinomas (chi-square, 27.97; P < .001) that have a rather heterogeneous clinical behavior and are difficult to subdivide on the basis of currently available markers. Cox multivariate analysis shows that p53 majority staining is second only to node status in significance of effect on overall survival.

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