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Introduction
Hormone Receptor Classification
Breast cancer cells may contain receptors, or binding sites, for hormones like estrogen or progesterone. Cells containing these binding sites are known as hormone receptor-positive cells, and they may be less aggressive than cells which lack these binding sites called hormone-receptor negative. Women have a better prognosis if their tumors are hormone receptor-positive.
High grade and hormonally unresponsive tumors are more frequently found in younger women, while low grade, hormonally responsive tumors are more frequent in older women.
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