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  • New measures could...

New measures could revolutionize breast cancer screening by mammogram

Written By : Hina Zahid |Medically Reviewed By : Dr. Kamal Kant Kohli Published On 2020-12-25T22:00:48+05:30  |  Updated On 24 Dec 2020 9:58 PM IST
New measures could revolutionize breast cancer screening by mammogram
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World-first techniques for predicting breast cancer risk from mammograms that were developed in Melbourne could revolutionise breast screening by allowing it to be tailored to women at minimal extra cost.

Published in the International Journal of Cancer, the University of Melbourne-led study found two new mammogram-based measures of risk. When these measures are combined, they are more effective in stratifying women in terms of their risk of breast cancer than breast density and all the known genetic risk factors.

Researchers say if successfully adopted, their new measures could substantially improve screening, make it more effective in reducing mortality and less stressful for women, and therefore encourage more to be screened. They could also help address the problem of dense breasts.

Since the late 1970s, scientists have known that women with denser breasts, which shows up on a mammogram as having more white or bright regions, are more likely to be diagnosed with breast cancer and to have it missed at screening.

Collaborating with Cancer Council Victoria and BreastScreen Victoria, University of Melbourne researchers were the first to study other ways of investigating breast cancer risk using mammograms.

Using computer programs to analyse mammogram images of large numbers of women with and without breast cancer, they found two new measures for extracting risk information. Cirrocumulus is based on the image's brightest areas and Cirrus on its texture.

First, they used a semi-automated computer method to measure density at the usual, and successively higher levels of brightness to create Cirrocumulus. They then used artificial intelligence (AI) and high-speed computing to learn about new aspects of the texture (not brightness) of a mammogram that predict breast cancer risk and created Cirrus.

When their new Cirrocumulus and Cirrus measures were combined, they substantially improved risk prediction beyond that of all other known risk factors.

Lead researcher and University of Melbourne Professor John Hopper said that in terms of understanding how much women differ in their risks of breast cancer, these developments could be the most significant since the breast cancer genes BRCA1 and BRCA2 were discovered 25 years ago.

"These measures could revolutionise mammographic screening at little extra cost, as they simply use computer programs," Professor Hopper said.

"The new measures could also be combined with other risk factors collected at screening, such as family history and lifestyle factors, to provide an even stronger and holistic picture of a woman's risk.

"Tailored screening -- not 'one size fits all' -- could then be based on accurately identifying women at high, as well as low, risk so that their screening can be personalised.

"Given mammography is now digital, and our measures are now computerised, women could be assessed for their risk at the time of screening -- automatically -- and given recommendations for their future screening based on their personal risk, not just their age."

Professor Hopper said this information could be used to ease pressure on BreastScreen, which had to close for a period during the COVID-19 pandemic and is looking for ways to best handle the backlog while continuing to provide a valuable service with limited resources.

He said the current breakthrough could not have occurred without the extraordinary support his mammogram research had received from the National Breast Cancer Foundation, starting with its first funding round more than 20 years ago.

"Only around 55 per cent of Australian women aged 50-74 currently present for screening aimed at detecting breast cancers early," he said.

"Knowing that screening could also give an accurate risk prediction could encourage more women to take up the offer of free screening. Women with high risk based on their mammogram would also benefit greatly from also knowing their genetic risk."

Adjunct Associate Professor Helen Frazer, Clinical Director of St Vincent's BreastScreen Melbourne, said that improvements in assessing a woman's risk of breast cancer would be transformative for screening programs.

"Using AI developments to assess risk and personalise screening could deliver significant gains in the fight against breast cancer," Adjunct Associate Professor Frazer said.

https://onlinelibrary.wiley.com/doi/10.1002/ijc.33396

breast cancerrevolutionize screeninginternational journal of cancerartificial intelligence
Source : International Journal of Cancer
Hina Zahid
Hina Zahid

    Hina Zahid Joined Medical Dialogue in 2017 with a passion to work as a Reporter. She coordinates with various national and international journals and association and covers all the stories related to Medical guidelines, Medical Journals, rare medical surgeries as well as all the updates in the medical field. Email: editorial@medicaldialogues.in. Contact no. 011-43720751

    Dr. Kamal Kant Kohli
    Dr. Kamal Kant Kohli

    Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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