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Mammogram

Mammography; Breast cancer - mammography; Breast cancer - screening mammography; Breast lump - mammogram; Breast tomosynthesis; 3D mammography; 2D mammography; Diagnostic mammogram

A mammogram is an x-ray picture of the breasts. It is used to evaluate some breast symptoms and to find breast cancer in women with no symptoms.

How the Test is Performed

You will be asked to undress from the waist up. You will be given a gown to wear. Depending on the type of equipment used and your physical condition, you will sit or stand.

One breast at a time is rested on a flat surface that contains the x-ray plate. A device called a compressor will be pressed firmly against your breast to help flatten the breast tissue. This enables the radiologist to make a better evaluation of your breasts.

The x-ray pictures are taken from several angles. You may be asked to hold your breath as each picture is taken.

You may be asked to come back at a later date for more mammogram images. This does not always mean you have breast cancer. Your health care provider may simply need to recheck an area that could not be clearly seen on the first test.

TYPES OF MAMMOGRAPHY

Traditional mammography uses film, similar to other x-rays.

Digital mammography is the most common technique:

  • It is now used in most breast screening centers.
  • It allows the x-ray image of the breast to be viewed and manipulated on a computer screen.
  • It may be more accurate in younger women with dense breasts. It has not yet been proven to help reduce a woman's risk of dying of breast cancer compared to film mammography.

Three-dimensional (3D) mammography is a type of digital mammography.

How to Prepare for the Test

Do not use deodorant, perfume, powders, or ointments under your arms or on your breasts on the day of the mammogram. These substances may hide a portion of the images or produce an artifact that can falsely look like an abnormality. Remove all jewelry from your neck and chest area.

Tell your provider and the x-ray technologist if you are pregnant or breastfeeding, or if you've had a breast biopsy.

How the Test will Feel

The compressor surfaces may feel cold. When the breast is pressed down, you may feel some brief pain or discomfort. This needs to be done to get good quality images.

Why the Test is Performed

When and how often to have a screening mammogram is a choice you must make. Different expert groups do not fully agree on the best timing for this test.

Before having a mammogram, talk to your provider about the pros and cons of having the test. Ask about:

  • Your risk for breast cancer
  • Whether screening decreases your chance of dying from breast cancer
  • Whether there is any harm from breast cancer screening, such as side effects from testing or overtreatment of cancer when it's discovered

Mammography is performed to screen women to detect early breast cancer when it is more likely to be cured. The recommendations of different expert organizations can differ.

  • Mammography is generally recommended for all women starting at age 40, repeated every 1 to 2 years.
  • Women with a family history of breast cancer should work with their provider to assess their risk of breast cancer. In some situations, additional testing may be considered.

Mammograms work best at finding breast cancer in women ages 40 to 74. It is not clear how well mammograms work at finding cancer in women age 75 and older.

Mammography is also used to:

  • Follow a woman who has had an abnormal mammogram.
  • Evaluate a woman who has symptoms of a breast disease. These symptoms may include a lump, nipple discharge, breast pain, dimpling of the skin on the breast, changes of the nipple, or other findings.

Normal Results

Breast tissue that shows no signs of a mass or suspicious looking calcifications is considered normal.

What Abnormal Results Mean

Most abnormal findings on a screening mammogram turn out to be benign (not cancer) or nothing to worry about. New findings or changes must be further evaluated.

A radiology doctor (radiologist) may see the following types of findings on a mammogram:

  • A well-outlined, smoothly marginated, rounded spot (this is more likely to be a noncancerous condition, such as a cyst)
  • Irregular appearing masses or lumps
  • Dense areas in the breast that can be breast cancer or hide breast cancer
  • Calcifications, which are caused by tiny deposits of calcium in the breast tissue (most calcifications are not a sign of cancer)

At times, the following tests are also needed to further assess mammogram findings:

Comparing your current mammogram to your past mammograms helps the radiologist tell whether you had an abnormal finding in the past and whether it has changed.

When mammogram or ultrasound results look suspicious, a biopsy is done to test the tissue and see if it is cancerous. Types of biopsies include:

Risks

The level of radiation is low and any risk from mammography is very low. If you are pregnant and need to have an abnormality checked, your belly area will be covered and protected by a lead apron.

Routine screening mammography is not done during pregnancy or while breastfeeding.

Open References

References

American Cancer Society website. American Cancer Society recommendations for the early detection of breast cancer. www.cancer.org/cancer/breast-cancer/screening-tests-and-early-detection/american-cancer-society-recommendations-for-the-early-detection-of-breast-cancer.html. Revised December 19, 2023. Accessed May 21, 2024.

American College of Obstetricians and Gynecologists (ACOG) website. ACOG Practice Bulletin: Breast cancer risk assessment and screening in average-risk women. No. 179, July 2017. www.acog.org/clinical/clinical-guidance/practice-bulletin/articles/2017/07/breast-cancer-risk-assessment-and-screening-in-average-risk-women. Reaffirmed 2021. Accessed May 21, 2024.

Henry NL, Shah PD, Haider I, Freer PE, Jagsi R, Sabel MS. Cancer of the breast. In: Niederhuber JE, Armitage JO, Kastan MB, Doroshow JH, Tepper JE, eds. Abeloff's Clinical Oncology. 6th ed. Philadelphia, PA: Elsevier; 2020:chap 88.

National Cancer Institute website. Breast cancer screening (PDQ) - health professional version. www.cancer.gov/types/breast/hp/breast-screening-pdq. Updated March 28, 2024. Accessed May 21, 2024.

US Preventive Services Task Force; Nicholson WK, Silverstein M, et al. Screening for breast cancer: US Preventive Services Task Force Recommendation Statement. JAMA. 2024 Apr 30. Epub ahead of print. PMID: 38687503. pubmed.ncbi.nlm.nih.gov/38687503/.

  • Breast cancer

    Animation

    •  

    Breast cancer - Animation

    Of all the different types of cancers, breast cancer is one of the most talked about, and with good reason. One out of every eight women will develop breast cancer sometime in their life. That's why every woman should be thinking about how to protect herself from this disease. Breast cancer is cancer that forms in the breast. Usually, it begins in the tubes that transport milk from the breast to the nipple. If the cancer spreads to other parts of the breast or body, it's called invasive breast cancer. Some breast cancers are more aggressive, growing more quickly than others. Although women are 100 times more likely to develop breast cancer, men can also get the disease because they do have breast tissue. You're more likely to get breast cancer if you're over 50, you started your periods before age 12, or you have a close family member with the disease. Drinking more than a couple of glasses of alcohol a day and using hormone replacement therapy for several years also may increase your risk. The telltale sign of breast cancer is a lump in your breast or armpit. You may also notice a change in the shape, size, or texture of your breast, or have fluid coming from your nipple when you're not breastfeeding. If you notice any changes in your breasts, call your doctor. You'll probably need to have an imaging scan, such as a mammogram, MRI, or ultrasound. A piece of tissue may be removed from your breast, called a biopsy. With these tests, your doctor can tell whether you have breast cancer, and if so, determine whether or not it has spread. So, how do we treat breast cancer? That really depends on the type of cancer, and how quickly it's spreading. Your doctor may recommend that you have the cancer removed with surgery. Sometimes it's enough just to remove the lump. That's called a lumpectomy. In other cases, the doctor will need to remove the entire breast to get rid of all the cancer or prevent it from coming back. That's called a mastectomy. Other treatments for breast cancer include chemotherapy, medicines that kill cancer cells, and radiation therapy, which uses energy to destroy cancer. Women whose cancer is fueled by the hormone estrogen may receive hormone therapy to block the effects of estrogen on their cancer. Today's breast cancer treatments are better than ever. Many women who have breast cancer go on to live long, healthy lives. The outlook really depends on how fast the tumor is growing, and how far it has spread. That's why it's so important to report any changes in your breasts to your doctor as soon as you notice them. Women who are at an especially high risk for breast cancer because of their family history can talk to their doctor about taking medicine or even having surgery to reduce their risk.

  • Female Breast

    Female Breast - illustration

    The female breast is either of two mammary glands (organs of milk secretion) on the chest.

    Female Breast

    illustration

  • Breast lumps

    Breast lumps - illustration

    Less than one-fourth of all breast lumps are found to be cancerous, but benign breast disease can be difficult to distinguish from cancer. Consequently, all breast lumps should be checked by a health care professional. Imaging tests such as mammogram and ultrasound may be needed for evaluation.

    Breast lumps

    illustration

  • Causes of breast lumps

    Causes of breast lumps - illustration

    Most breast lumps are benign (non-cancerous), as in fibroadenoma, a condition that mostly affects women under age 30. Fibrocystic breast changes occur in more than 60% of all women. Fibrocystic breast cysts change in size with the menstrual cycle, whereas a lump from fibroadenoma does not. While most breast lumps are benign, it is important to identify those that are not. See your health care provider if a lump is new, persistent, growing, hard, immobile, or causing skin deformities.

    Causes of breast lumps

    illustration

  • Mammary gland

    Mammary gland - illustration

    The anatomy of the breast includes the lactiferous, or milk ducts, and the mammary lobules.

    Mammary gland

    illustration

  • Abnormal discharge from the nipple

    Abnormal discharge from the nipple - illustration

    Abnormal nipple discharge may be described as any discharge not associated with lactation. The nature of the discharge may range in color, consistency and composition, and occur in one or both breasts.

    Abnormal discharge from the nipple

    illustration

  • Fibrocystic breast disease

    Fibrocystic breast disease - illustration

    Fibrocystic breast change is a common and benign change within the breast characterized by a dense irregular and bumpy consistency in the breast tissue. Mammography or biopsy may be needed to rule out other disorders.

    Fibrocystic breast disease

    illustration

  • Mammogram

    Mammogram - illustration

    A mammogram is an x-ray picture of the breasts. It is used to find tumors and to help tell the difference between noncancerous (benign) and cancerous (malignant) disease. One breast at a time is rested on a flat surface that contains the x-ray plate. A device called a compressor is pressed firmly against the breast to help flatten out the breast tissue. Each breast is compressed horizontally, then obliquely and an x-ray is taken of each position.

    Mammogram

    illustration

  • Breast cancer

    Animation

    •  

    Breast cancer - Animation

    Of all the different types of cancers, breast cancer is one of the most talked about, and with good reason. One out of every eight women will develop breast cancer sometime in their life. That's why every woman should be thinking about how to protect herself from this disease. Breast cancer is cancer that forms in the breast. Usually, it begins in the tubes that transport milk from the breast to the nipple. If the cancer spreads to other parts of the breast or body, it's called invasive breast cancer. Some breast cancers are more aggressive, growing more quickly than others. Although women are 100 times more likely to develop breast cancer, men can also get the disease because they do have breast tissue. You're more likely to get breast cancer if you're over 50, you started your periods before age 12, or you have a close family member with the disease. Drinking more than a couple of glasses of alcohol a day and using hormone replacement therapy for several years also may increase your risk. The telltale sign of breast cancer is a lump in your breast or armpit. You may also notice a change in the shape, size, or texture of your breast, or have fluid coming from your nipple when you're not breastfeeding. If you notice any changes in your breasts, call your doctor. You'll probably need to have an imaging scan, such as a mammogram, MRI, or ultrasound. A piece of tissue may be removed from your breast, called a biopsy. With these tests, your doctor can tell whether you have breast cancer, and if so, determine whether or not it has spread. So, how do we treat breast cancer? That really depends on the type of cancer, and how quickly it's spreading. Your doctor may recommend that you have the cancer removed with surgery. Sometimes it's enough just to remove the lump. That's called a lumpectomy. In other cases, the doctor will need to remove the entire breast to get rid of all the cancer or prevent it from coming back. That's called a mastectomy. Other treatments for breast cancer include chemotherapy, medicines that kill cancer cells, and radiation therapy, which uses energy to destroy cancer. Women whose cancer is fueled by the hormone estrogen may receive hormone therapy to block the effects of estrogen on their cancer. Today's breast cancer treatments are better than ever. Many women who have breast cancer go on to live long, healthy lives. The outlook really depends on how fast the tumor is growing, and how far it has spread. That's why it's so important to report any changes in your breasts to your doctor as soon as you notice them. Women who are at an especially high risk for breast cancer because of their family history can talk to their doctor about taking medicine or even having surgery to reduce their risk.

  • Female Breast

    Female Breast - illustration

    The female breast is either of two mammary glands (organs of milk secretion) on the chest.

    Female Breast

    illustration

  • Breast lumps

    Breast lumps - illustration

    Less than one-fourth of all breast lumps are found to be cancerous, but benign breast disease can be difficult to distinguish from cancer. Consequently, all breast lumps should be checked by a health care professional. Imaging tests such as mammogram and ultrasound may be needed for evaluation.

    Breast lumps

    illustration

  • Causes of breast lumps

    Causes of breast lumps - illustration

    Most breast lumps are benign (non-cancerous), as in fibroadenoma, a condition that mostly affects women under age 30. Fibrocystic breast changes occur in more than 60% of all women. Fibrocystic breast cysts change in size with the menstrual cycle, whereas a lump from fibroadenoma does not. While most breast lumps are benign, it is important to identify those that are not. See your health care provider if a lump is new, persistent, growing, hard, immobile, or causing skin deformities.

    Causes of breast lumps

    illustration

  • Mammary gland

    Mammary gland - illustration

    The anatomy of the breast includes the lactiferous, or milk ducts, and the mammary lobules.

    Mammary gland

    illustration

  • Abnormal discharge from the nipple

    Abnormal discharge from the nipple - illustration

    Abnormal nipple discharge may be described as any discharge not associated with lactation. The nature of the discharge may range in color, consistency and composition, and occur in one or both breasts.

    Abnormal discharge from the nipple

    illustration

  • Fibrocystic breast disease

    Fibrocystic breast disease - illustration

    Fibrocystic breast change is a common and benign change within the breast characterized by a dense irregular and bumpy consistency in the breast tissue. Mammography or biopsy may be needed to rule out other disorders.

    Fibrocystic breast disease

    illustration

  • Mammogram

    Mammogram - illustration

    A mammogram is an x-ray picture of the breasts. It is used to find tumors and to help tell the difference between noncancerous (benign) and cancerous (malignant) disease. One breast at a time is rested on a flat surface that contains the x-ray plate. A device called a compressor is pressed firmly against the breast to help flatten out the breast tissue. Each breast is compressed horizontally, then obliquely and an x-ray is taken of each position.

    Mammogram

    illustration

Tests for Mammogram

 
 

Review Date: 1/14/2023

Reviewed By: Neil Grossman, MD, MetroWest Radiology Associates, Framingham, MA. Review provided by VeriMed Healthcare Network. Internal review and update on 02/04/2024 by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. Editorial update 05/22/2024.

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