p53 and Neu (c-erbB-2) Overexpression in Relation to Risk Factors for Breast Cancer
Different types of breast cancer, with and without protein overexpression of neu (c-erbB-2) or p53, were studied to determine whether there was an association with known risk factors for breast cancer. Neu and p53 protein expressions were evaluated by immunohistochemistry in primary breast tumor samples from a series of patients aged 20–54 years, who participated in a case-control study. Neu overexpression was shown in 117 out of 597 tumors (19.6%) and p53 overexpression in 142 out of 528 tumors (26.9%). Diagnosis at a young age (≤35 years) was found to be associated with p53 and neu overexpression. Age at first full-term pregnancy (≥29 years) was more strongly related to neu[+] than to neu[−] tumors. Other risk factors were not significantly associated for breast tumors categorized according to neu or p53 protein expression.
KeywordsBreast Cancer Polytomous Logistic Regression Invasive Breast Cancer Case Scattered Staining Risk Factor Association
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