Abstract
In 150 surgically resected primary breast carcinomas that had axillary lymph-node metastases, we examined the incidence of loss of heterozygosity on chromosomes 16p, 16q, 17p, 17q, and 18q, point mutation of the p53 tumor-suppressor gene, nuclear immunoreaction of p53 protein, and amplifications of the c-erbB-2 and int-2 oncogenes by Southern blotting, single-strand conformation polymorphism analysis, and immunohistochemistry. We analyzed the association of these factors and conventional prognostic parameters with outcome of the patients, using Cox's univariate and multivariate analyses. The univariate analysis revealed that nuclear p53 immunoreaction, p53 mutation, and c-erbB-2 amplification as well as the number of metastatic lymph nodes, histological grade, and hormone-receptor statuses were significant prognostic indicators for both recurrence and cancer death. p53 immunoreaction was correlated more strongly with a poor prognosis than p53 mutations. The combination of p53 and c-erbB-2 effectively identified the high-risk patient group, and even among Grade 3 cases the subgroup with these alterations tended to have poorer clinical outcomes. The multivariate analysis including p53, c-erbB-2, and conventional factors. Lymph no...Continue Reading
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