The removal of a sample of tissue or cells for examination under a microscope for purposes of diagnosis. The principal genes that, when altered, indicate an inherited susceptibility to breast cancer. These gene alterations are present in 80 to 90 percent of hereditary cases of breast cancer. Glandular tissue in the breast common in younger women, making it difficult for mammography to detect breast cancer. A general name for more than 100 diseases in which abnormal cells grow out of control.
Most cancers are carcinomas.
The use of drugs or vitamins to prevent cancer in people who have precancerous conditions or a high risk of cancer, or to prevent the recurrence of cancer in people who have already been treated for it. Structures located in the nucleus of a cell, containing genes. The use of a small cutting needle to remove a core of tissue for microscopic examination. Normal tissue changes that occur in response to the changing levels of female hormones during the menstrual cycle. Cyclic breast changes can produce swelling, tenderness, and pain.