Breast Cancer Disease: Breast Cancer Disease

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, with three-quarters of all cases being diagnosed after age 50. Generally, the older a woman is, the greater is her likelihood of developing breast cancer. Worldwide, breast cancer is the most common cancer among women, and in North America and Western Europe, where life spans are longer, the incidence is highest. In addition, in high-income countries, breast cancer is the leading cause of cancer death among women age 20 to 59.

Causes and symptoms

The exact causes of breast cancer are largely unknown, but both environmental and genetic factors are involved. Specific mutations in genes called HER2, CHEK2, and p53 have been linked to breast cancer; these mutations may be inherited or acquired.Mutations that are inherited often substantially increase a person’s risk for developing breast cancer. For example, whereas some 12 percent of women in the general population develop breast cancer, roughly 60 percent of women who inherit mutations in BRCA1 or BRCA2 eventually develop the disease. Women who carry these mutations also have an increased risk of. About 9 percent of men carrying BRCA1 or BRCA2 mutations will develop breast cancer by age 80.

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Friday, July 8, 2011

Breast Cancer Disease

Causes and symptoms

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