Abstract

We evaluated the relationship between the DNA ploidy status and other variable prognostic factors, especially regional lymph node metastases, in 121 patients with invasive ductal carcinoma of breast, together with the value of these factors in estimating the prognostic of breast cancer. The ploidy status was diploid in 40% of the patients, and aneuploid in 60%. A significantly higher incidence of aneuploidy was found in patients with more than 4 positive axillary lymph nodes, positive internal mammary lymph nodes, or clinical stage 3 of malignancy. In a univariate study, overall survival and disease-free survival were significantly correlated with axillary and internal mammary lymph node metastases, tumor size, and clinical stage of malignancy. The disease-free survival rates for the diploid group tended to be somewhat higher than those for the aneuploid group of patients without axillary lymph node metastases. In the multivariate analysis, however, only axillary lymph node metastasis was significantly correlated with overall survival and disease-free survival. There was also a trend for the internal mammary lymph node metastases to be correlated with survival. As the DNA ploidy status was closely correlated with the axillary and internal mammary lymph node metastases, it did not appear to be an independent prognostic factor in this small series.

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