What is breast cancer? What causes breast cancer?

Сообщение 2023-01-28 07:52:56

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Breast cancer is a common term for a cancerous (malignant) tumor that starts in the cells that line the ducts and/or lobules of the breast. Breast cancer is not one disease; rather it is several diseases that behave differently.

Breast cancer’s causes are not exactly clear. Studies have identified numerous risk factors for breast cancer in women, including hormonal, lifestyle and environmental factors that may increase the risk of breast cancer. Other factors include:

Increasing ag
Personal history of breast cancer
Early menstruation
Late menopause
A first pregnancy after age 30 or no prior pregnancies

Use of oral contraceptives
Family history of breast cancer
Presence of certain inherited genetic changes
History of radiation therapy to the chest
Long-term use of combined hormone therapy

Alcohol use
Obesity after menopause

It's unclear why some people who have no risk factors develop cancer, while others with risk factors never do.

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