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2 天前 · Breast cancer, disease characterized by the growth of malignant cells in the mammary glands. Breast cancer can strike males and females, although women are about 100 times more likely to develop the disease than men. Most cancers in female breasts form shortly before, during, or after menopause.
- The Editors of Encyclopaedia Britannica
breast cancer, Malignant tumour in a breast, usually in women after menopause. Risk factors include family history of breast cancer, prolonged menstruation, late first pregnancy (after age 30), obesity, alcohol use, and some benign tumours. Most breast cancers are adenocarcinomas.
Breast Cancer Awareness Month, international health campaign lasting the month of October that aims to increase awareness of breast cancer. In the United States the monthlong campaign is known as National Breast Cancer Awareness Month. Learn about the origins and significance of Breast Cancer Awareness Month.
- Kara Rogers
2024年5月23日 · Cancer, group of numerous distinct diseases that are characterized by the uncontrolled multiplication of abnormal cells in the body. Cancer is a major cause of sickness and death worldwide. Learn more about the history of cancer, cancer rates and trends, and
2024年5月21日 · Mastectomy, surgical removal of a breast, usually to remove a malignancy but also performed in the treatment of other conditions (e.g., cystic breast disease) and for other medical reasons. Mastectomy is most effective when the cancerous tumour is discovered at an early stage and the malignant
- The Editors of Encyclopaedia Britannica
2024年4月29日 · Tamoxifen, synthetic hormone, used primarily in the prevention and treatment of breast cancer, that inhibits the growth-promoting actions of estrogen in breast cancer cells. Tamoxifen was first synthesized in 1962 by scientists at the British pharmaceutical company Imperial Chemical Industries PLC.
antiestrogen, any substance that blocks the synthesis or action of the hormone estrogen. Estrogen can be both a beneficial and a harmful hormone. It maintains skeletal strength by preventing the loss of bone and enhancing calcium retention.
