A tumour marker is a naturally occurring substance in the body that, if present in increased amounts, can indicate the presence of a cancer. Some tumour markers are specific to one type of cancer, while others are related to several different types of cancer. Tumour markers may also increase with no. A laboratory test of breast cancer tissue to determine the responsiveness of the tumor to endocrine therapyor to removal of the ovaries. Tumors which are negative for estrogenreceptors rarely respond to hormonemanipulation; about 55% of ER positive tumors will respond to endocrine therapy.
In breast cancer care, three tumor markers -- cancer antigen (CA ), cancer antigen (CA ), and carcinoembryonic antigen (CEA) -- have been used to help monitor metastatic breast cancer (advanced disease), but they have not been found to be useful to find a breast cancer recurrence or lengthen lives in patients who had early-stage breast cancer and who are now disease-free. Doctors use imaging tests to make pictures (images) of the inside of your body. Imaging tests can be used in many ways, including to look for cancer, to find out how far it has spread, and to help determine if cancer treatment is working.
The CA is one of several tumor markers used to monitor people with stage 4 breast cancer (also known as metastatic breast cancer). 1 While some oncologists will use the test to detect breast cancer recurrence, it is not endorsed for this use. Types of Metastatic Breast Cancer. This type of cancer often grows faster, spreads to other areas more readily, and has a higher likelihood of recurring versus HER2-negative breast cancer. Blood Testing for HER2/neu. Sometimes, especially when there is not enough tumor tissue available to perform the test, a blood sample is drawn from the patient’s arm to collect similar data.
A laboratory test of breast cancer tissue to determine the responsiveness of the tumor to endocrine therapy or to removal of the ovaries. Progesterone receptorassayincreases the reliabilityof estrogen receptorassay results: a positive progesterone receptor assay indicates greater likelihood that the patient will respond to hormone therapy. A tumor marker is anything present in or produced by cancer cells or other cells of the body in response to cancer or certain benign (noncancerous) conditions that provides information about a cancer, such as how aggressive it is, whether it can be treated with a targeted therapy, or whether it is responding to treatment.