This year, more than 26,000 women in Canada will be diagnosed with breast cancer, and 5,000 will die of it. A new guideline published in the Canadian Medical Association Journal are meant to save lives through early detection. But critics have their doubts.

Canada’s new breast screening guidelines will cause unnecessary deaths and harm and should be ignored by women and their family physicians, say two of this country’s leading breast screening experts.

Health minister Adrian Dix’s announcement that B.C. will be the first province to notify women if they have dense breasts after screening mammograms, and may therefore be at higher risk of cancer, has led to some concerns and confusion about how the information should be used.

When Ann Hill was told she had breast cancer, she was floored. Six months earlier, she had a clear mammogram and the diagnosis seemingly came out of nowhere. But that’s when a doctor told her having dense breasts makes a tumour hard to see, and that her cancer has been there for a while.

Dense breasts make it harder to spot cancer in mammograms — but not all affected women know they’re at risk. In 2014, Michelle Di Tomaso was in her doctor’s office after work when she heard the words she’ll never forget. “She just turned to me and said, ‘You have breast cancer,’” Di Tomaso recalled.

B.C. is becoming the first province in Canada to provide information about breast density to women and their doctors after their mammogram screening tests. Health officials will begin providing women with the information beginning mid-October.

An advocacy group called Dense Breasts Canada says Health PEI should be telling Island women about their breast density. In a mammogram, cancer can be harder to see in women with dense breasts. While fatty tissue appears as dark grey in a mammogram, dense tissue shows up as mostly white — just like cancers.

Kathy Kaufield has notched another victory. The former Stratford, P.E.I., resident started a social media campaign, #TellMe, to press political leaders to provide women with information about their breast density after receiving mammograms.

FREDERICTON — A breast cancer survivor and advocate had a sweet victory Friday: She saw the two leading parties adopt her cause as platform planks for the Sept. 24 New Brunswick election. “I’m dancing a happy dance,” Kathy Kaufield said after both the Liberals and Progressive Conservatives pledged Friday to ensure women are given information on their breast density following mammograms.