Breast cancer is a disease in which abnormal cells in breast tissue grow out of control. It most often begins in the ducts or lobules and may form a tumor that can sometimes spread beyond the breast.
Breast cancer means abnormal breast cells are growing in an uncontrolled way. These cells may form a tumor, invade nearby tissue, or spread through lymph vessels or blood vessels. Many breast cancers begin in the milk ducts or lobules.
Breast cancer is a disease where cells in the breast grow out of control. These abnormal cells may form a tumor and can sometimes spread outside the breast. Breast cancer is not one single disease; it includes different types with different biology, behavior, and research importance.
The breast contains ducts, lobules, and connective tissue. Ducts carry milk to the nipple, lobules produce milk, and connective tissue supports the breast. Most breast cancers begin in the ducts or lobules.
Tubes that carry milk toward the nipple.
Glands that produce milk.
Supportive tissue around breast structures.
Breast cancer can develop when biological changes affect how cells grow, divide, and respond to normal control signals. Abnormal cells may multiply, form a tumor, interact with nearby tissue, and sometimes enter lymph or blood vessels.
Abnormal cells remain inside the milk ducts and have not invaded nearby tissue.
Cancer begins in a duct and grows into nearby breast tissue.
Cancer begins in the lobules and grows into surrounding tissue.
A subtype that does not express ER, PR, or HER2 markers.
Breast cancer can spread beyond the breast through lymph vessels or blood vessels. When cancer spreads to distant parts of the body, it is called metastatic breast cancer.
Early detection can help find breast cancer when it may be easier to treat. Screening does not prevent breast cancer, but it can help detect cancer before symptoms appear.
Breast cancer research may study biomarkers, hormone receptors, HER2 status, tumor microenvironment, genetic changes, immune activity, and pathology patterns. CancerSpot Research connects educational cancer guides with oncology-focused research products.
View Breast Cancer Research Products →Breast cancer is when abnormal cells in the breast grow out of control. These cells may form a tumor and can sometimes spread beyond the breast.
Many breast cancers begin in the milk ducts or lobules, which are parts of the breast involved in milk movement and production.
No. Breast cancer includes different types and subtypes. These may behave differently and may be studied using biomarkers such as hormone receptors and HER2.
Yes. Breast cancer is much more common in women, but men can also develop breast cancer.