What Happens
Breast cancer
occurs when cells in the breast grow abnormally. As the breast cancer grows, it
can spread to nearby tissues and
lymph nodes
. Advanced breast cancer can affect the bones, liver, and brain.
Fortunately, when found at an early stage, breast cancer is highly curable.
Your doctor will learn more about how your breast cancer may behave when
the cancer cells are examined under the microscope. This is called
classification. It tells your doctor how rapidly the
cancer cells are growing and dividing and where they may have started in the
breast tissue.
Tests for hormone receptors and other tumor markers
are usually done after surgery with tissue from a lumpectomy or
mastectomy. All of this information will help you and your doctor
make decisions about treatment.
The
stage indicates how far the cancer has spread within
the breast, to nearby tissues, and to other organs. Your doctor will determine
the stage of your breast cancer by gathering information from other tests, such
as axillary lymph node surgery, blood tests,
bone scans, ultrasounds, and
X-rays. The stage of your cancer is one of the most
important pieces of information that will help guide your treatment
options.