Oncology & Cancer

'Structural racism' cited in study of breast-biopsy delays

Black and Asian women are more likely than white women to experience significant delays in getting breast biopsies after a mammogram identifies an abnormality. Moreover, those delays appear to be influenced by screening site-specific ...

Oncology & Cancer

Women know little about overdiagnosis of breast cancer

Women know less about the so-called overdiagnosis of breast cancer compared to other aspects of mammogram screening. Despite this, there are few indications that women drop out of mammogram screening programs after receiving ...

Oncology & Cancer

Personalized cancer screening with AI

While mammograms are currently the gold standard in breast cancer screening, swirls of controversy exist: advocates argue for the ability to save lives, (women aged 60 to 69 had a 33 percent lower risk of dying compared to ...

Oncology & Cancer

Diagnosing breast cancer using skin electrical resistance

Mammograms are a safe, effective way to detect the presence of breast cancer in women. But doctors recommend most females should start getting mammograms after the age of 40 in part because the procedure involves small doses ...

Radiology & Imaging

Mayo Clinic Minute: Mammograms, COVID-19 vaccines and timing

If you are due for your annual breast cancer screening and vaccinations, including vaccinations for flu and COVID-19, you may want to consider timing to avoid any concerns. That's because some people can have swelling in ...

Oncology & Cancer

Consumer Health: Are you due for a mammogram?

A mammogram is an X-ray image of your breasts that is used to screen for breast cancer. Mammograms play a key role in early breast cancer detection and help decrease breast cancer deaths.

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Mammography

Mammography is the process of using low-dose amplitude-X-rays (usually around 0.7 mSv) to examine the human breast and is used as a diagnostic as well as a screening tool. The goal of mammography is the early detection of breast cancer, typically through detection of characteristic masses and/or microcalcifications. Mammography is believed to reduce mortality from breast cancer. No other imaging technique has been shown to reduce risk, but breast self-examination (BSE) and physician examination are considered essential parts of regular breast care.

In many countries routine mammography of older women is encouraged as a screening method to diagnose early breast cancer. The United States Preventive Services Task Force recommends screening mammography, with or without clinical breast examination, every 1-2 years for women aged 40 and older. Altogether clinical trials have found a relative reduction in breast cancer mortality of 20%, but the two highest-quality trials found no reduction in mortality. Mammograms have been controversial since 2000, when a paper highlighting the results of the two highest-quality studies was published.

Like all x-rays, mammograms use doses of ionizing radiation to create images. Radiologists then analyze the image for any abnormal findings. It is normal to use longer wavelength X-rays (typically Mo-K) than those used for radiography of bones.

At this time, mammography along with physical breast examination is the modality of choice for screening for early breast cancer. Ultrasound, ductography, positron emission mammography (PEM), and magnetic resonance imaging are adjuncts to mammography. Ultrasound is typically used for further evaluation of masses found on mammography or palpable masses not seen on mammograms. Ductograms are still used in some institutions for evaluation of bloody nipple discharge when the mammogram is non-diagnostic. MRI can be useful for further evaluation of questionable findings as well as for screening pre-surgical evaluation in patients with known breast cancer to detect any additional lesions that might change the surgical approach, for instance from breast-conserving lumpectomy to mastectomy. New procedures, not yet approved for use in the general public, including breast tomosynthesis may offer benefits in years to come.

Mammography has a false-negative (missed cancer) rate of at least 10 percent. This is partly due to dense tissues obscuring the cancer and the fact that the appearance of cancer on mammograms has a large overlap with the appearance of normal tissues.

This text uses material from Wikipedia, licensed under CC BY-SA