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    Breast Cancer Treatment (PDQ®): Treatment - Patient Information [NCI] - General Information About Breast Cancer

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    Tests that examine the breasts are used to detect (find) and diagnose breast cancer.

    A doctor should be seen if changes in the breast are noticed. The following tests and procedures may be used:

    • Physical exam and history: An exam of the body to check general signs of health, including checking for signs of disease, such as lumps or anything else that seems unusual. A history of the patient's health habits and past illnesses and treatments will also be taken.
    • Clinical breast exam (CBE): An exam of the breast by a doctor or other health professional. The doctor will carefully feel the breasts and under the arms for lumps or anything else that seems unusual.
    • Mammogram: An x-ray of the breast.
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      Mammography. The breast is pressed between two plates. X-rays are used to take pictures of breast tissue.
    • Ultrasound exam: A procedure in which high-energy sound waves (ultrasound) are bounced off internal tissues or organs and make echoes. The echoes form a picture of body tissues called a sonogram. The picture can be printed to be looked at later.
    • MRI (magnetic resonance imaging): A procedure that uses a magnet, radio waves, and a computer to make a series of detailed pictures of areas inside the body. This procedure is also called nuclear magnetic resonance imaging (NMRI).
    • Blood chemistry studies: A procedure in which a blood sample is checked to measure the amounts of certain substances released into the blood by organs and tissues in the body. An unusual (higher or lower than normal) amount of a substance can be a sign of disease in the organ or tissue that makes it.
    • Biopsy: The removal of cells or tissues so they can be viewed under a microscope by a pathologist to check for signs of cancer. If a lump in the breast is found, the doctor may need to remove a small piece of the lump. Four types of biopsies are as follows:
      • Excisional biopsy: The removal of an entire lump of tissue.
      • Incisional biopsy: The removal of part of a lump or a sample of tissue.
      • Core biopsy: The removal of tissue using a wide needle.
      • Fine-needle aspiration (FNA) biopsy: The removal of tissue or fluid, using a thin needle.
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