Understanding Breast Cancer » What is Breast Cancer
Breast cancer is a type of cancer where cells in the breast divide and grow without normal control. Between 50 and 75 percent of breast cancers begin in the ducts, 10 to 15 percent begin in the lobules and a few begin in other breast tissues. Tumors in the breast tend to grow slowly. By the time a lump is large enough to be felt, it may have been growing for as long as 10 years. However, some tumors are aggressive and grow much more rapidly.
Breast cancer is the leading cause of cancer-related deaths world wide. In recent years it has also emerged as the most common female cancer in the developing Asian countries.