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Is 3D Mammography more effective in detecting breast cancer?


News provided by

Ottawa Integrative Cancer Centre (OICC)

Feb 08, 2017, 04:00 ET

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The Ottawa Hospital Breast Health Centre and Ottawa Integrative Cancer Centre collaborate on clinical trial for breast cancer screening with digital breast tomosynthesis

OTTAWA, Feb. 8, 2017 /CNW/ - Researchers from The Ottawa Hospital Breast Health Centre and the Ottawa Integrative Cancer Centre (OICC) have opened the Ottawa site of the Lead-In to the Tomosynthesis Mammographic Imaging Screening Trial (TMIST). The Breast Health Centre is one of three clinical trial sites to launch the Lead-In in Canada. It is expected that shortly this trial will be integrated into a larger U.S./Canada TMIST, managed by the ECOG-ACRIN Cooperative Clinical Trials Group.

TMIST is the first large randomized, multi-centre study to assess whether a novel "3D" digital tomosynthesis technology combined with 2D digital mammography may be more effective at reducing the incidence of advanced breast cancers than conventional 2D mammography alone. Previous smaller studies suggest that this new kind of mammography can increase breast cancer detection and reduce the rate of false positives and recalls for women who do not have cancer. If successful, implementation of this technology would provide greater assurance of an effective test, reduce patient stress and anxiety, and ultimately reduce costs to the health-care system.  The current Lead-In study aims to enroll 6,300 women in Canada, including 2,000 from Ottawa. Women attending mammographic screening at the Breast Health Centre may be approached to participate.

Digital breast tomosynthesis uses multiple low-dose images of the breast that are layered into a pseudo 3D view instead of the traditional 2D views. As information is not superimposed, tomosynthesis creates a richer and clearer image that may help avoid missing cancers that may be hidden in surrounding breast tissue.

"Tomosynthesis is the most advanced and exciting technology for mammography," said Dr. Jean Seely, Head of Breast Imaging at the Breast Health Centre, associate professor at the University of Ottawa and lead investigator of TMIST Lead-In in Ottawa. "When the full study begins, it will be the largest and most important study to evaluate both 3D and 2D mammography technology together. Outcomes of the study will allow us to decide how we move forward from 2D to 3D screening. Our goal is to improve on ways to detect important cancers as early as possible in order to save lives."

"We are pleased to collaborate and help fund this critical trial," said Dugald Seely, naturopathic doctor, Executive Director of the OICC, and co-investigator of TMIST in Ottawa. "Imaging and mammography are stressful events. The OICC is committed to supporting women so that they receive the best diagnostic technology, limiting unnecessary anxiety and ultimately reducing the burden of disease. The screening program is potentially revolutionary and we hope will be more accurate in correctly finding breast cancers that may not otherwise be diagnosed."

Breast cancer is the leading cause of death amongst women between 40 and 50 years of age. At The Ottawa Hospital there are one thousand new cases of breast cancer diagnosed per year.

Screening mammography has been shown to reduce the mortality of breast cancer. Specifically, women with breast cancer who underwent prior screening had a death rate of approximately six percent after five years compared to 15 percent for people who did not undergo screening. Despite this fact, there is extensive controversy surrounding screening. The harms of high numbers of false positives from 2D mammography have called screening into question. For every 100 women who are recalled for additional testing, more than 90 will have a normal finding or benign disease. This high number of initial false positives creates stress for women and may lead to decreased screening use, with a potential greater loss of lives from undetected cancer. It is hoped that tomosynthesis technology will reduce false positives, improve sensitivity and overall accuracy of digital mammograms.

The full TMIST study of 165,000 women will be led by Dr. Etta Pisano, Dean Emerita, College of Medicine, Medical University of South Carolina and current Vice-Chair of Research in the Department of Radiology at Beth Israel Deakoness Medical Center, Harvard University. The Canadian Lead-in study is being led by Dr. Martin Yaffe, Senior Scientist, Imaging Research, Sunnybrook Research Institute, Professor of Depts. Medical Biophysics and Medical Imaging, at University of Toronto.

This study has been approved by the Ottawa Health Science Network Research Ethics Board. Further details are available on the Canadian Cancer Trials website.

About The Ottawa Hospital and its Breast Health Centre
The Ottawa Hospital is one of Canada's largest learning and research hospitals with over 1,100 beds, approximately 12,000 staff and an annual budget of over $1.2 billion. Our focus on research and learning helps us develop new and innovative ways to treat patients and improve care. As a multi-campus hospital, affiliated with the University of Ottawa, we deliver specialized care to the Eastern Ontario region, but our techniques and research discoveries are adopted around the world. We engage the community at all levels to support our vision for better patient care.

Since its opening in 1997, The Ottawa Hospital Breast Health Centre has been dedicated to providing the highest quality care for breast patients across the Champlain Local Health Integration Network (LHIN). The Centre continues as a comprehensive breast centre that offers expertise in breast imaging, biopsy, diagnosis, risk assessment, surgical planning and psychosocial support for patients, and their families, in a caring environment. The Breast Health Centre offers high quality assessments in diagnostic imaging, diagnosing more than 85% of the breast cancers at The Ottawa Hospital, performing over 2,500 breast biopsies every year.

About the Ottawa Integrative Cancer Centre (OICC)
The OICC is changing how people are living with cancer. The OICC approach to integrative cancer care enables people to live the best they can while undergoing hospital-based treatment, by reducing side effects, improving quality of life, and helping prevent recurrence. The OICC is the first integrative cancer care and research centre in Central and Eastern Canada, and has been awarded the two largest-ever integrative cancer care research grants in North America. A not-for-profit, the OICC provides a range of supportive programs for patients including the Babes4Breasts Head Start Program for women newly diagnosed with breast cancer. www.oicc.ca

About the University of Ottawa — A crossroads of cultures and ideas
The University of Ottawa is home to over 50,000 students, faculty and staff, who live, work and study in both French and English. Our campus is a crossroads of cultures and ideas, where bold minds come together to inspire game-changing ideas. We are one of Canada's top 10 research universities—our professors and researchers explore new approaches to today's challenges. One of a handful of Canadian universities ranked among the top 200 in the world, we attract exceptional thinkers and welcome diverse perspectives from across the globe. www.uottawa.ca      

SOURCE Ottawa Integrative Cancer Centre (OICC)

Heidi Vincent, Ottawa Integrative Cancer Centre, 613-293-3564, [email protected]; Jenn Ganton, Ottawa Hospital Research Institute, 613-614-5253, [email protected]

Related Links

http://www.oicc.ca

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Ottawa Integrative Cancer Centre (OICC)

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