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BACKGROUND Immunohistochemical techniques allow the study of tumoral markers with predictive or prognostic value. OBJECTIVE To study tumoral markers in mammary carcinoma and to relate these markers with age and tumoral histological grade. METHODS The expression of nuclear estrogen receptor (RE), nuclear progesterone receptor (PGR), p53 and c-erb-B2 proteins was analyzed in 382 cases of infiltrating ductal carcinoma of the breast. RESULTS The histological grade was I in 22% tumors, II in 56% and III in 23%. Forty nine percent of tumors had positive staining for RE, 41% for RPG, 45% for p53 and 57% for c-erb-B2. Correlation was found between histological grade and expression of RE, p53 and c-erb-B2 between RE and PGR, RE and c-erb-B2 and between c-erb-B2 and p5. RE expression correlated with age. CONCLUSIONS A reliable and rapid evaluation of these markers can be achieved using immunohistochemical staining. The present results are similar to other biochemical and immunohistochemical studies.
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