Abstract
To investigate the effect of neoadjuvant chemotherapy on estrogen receptor (ER) and progesterone receptor (PR) expression in breast carcinoma. Samples were obtained from 31 patients with breast carcinoma who received neo-adjuvant chemotherapy, ER or PR expressions were analyzed in preoperative core biopsies and final surgical specimens. ER level was up-regulated in 13 (41.9%) out of 31 cases, PR level was up-regulated in 10 (32.3%). Both ER level and PR level were up-regulated in 8 (25.8%) out of 31 cases. Neoadjuvant chemotherapy may impact the hormone receptor status, ER and PR expression re-analysis in final surgical specimens is recommended.
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