Early Detection Saves Lives, Breast Screening Age Reduced to 40 in Ontario

Breast cancer is the leading cause of death in Canadian women ages 30-491 and 75% of breast cancers occur in women with no family history or known risk factors.2 18% of breast cancers occur in ages 40-493 and are often more aggressive, while women of colour are 72% more likely to be diagnosed with breast cancer before age 50.4
That’s why we’re thrilled that some provinces and territories have reduced the age for breast screening from 50 to 40. Detecting breast cancer earlier can make a huge difference for a woman’s survival and quality of life. The earlier it is detected, there are more treatment options and a better chance of a full recovery. It’s not just about extending life–it’s about offering hope and spending precious time with friends and family.
More recently, Ontario reduced the age of screening to 40 on October 8th, 2024. To commemorate this historic milestone, Hologic’s Breast & Skeletal Health Solutions division created a video to highlight how lowering the age of screening may save a woman’s life.
Timing is everything.
Seely JM, Ellison LF, Billette J-M et al. Incidence of Breast Cancer in Younger Women: A Canadian Trend Analysis. Canadian Association of Radiologists Journal. 2024:0(0).
Haber G, Ahmed NU, Pekovic V. Family history of cancer and its association with breast cancer risk perception and repeat mammography. Am J Public Health. 2012 Dec;102(12):2322-9. doi: 10.2105/AJPH.2012.300786. Epub 2012 Oct 18. PMID: 23078489; PMCID: PMC3519312.
Chang HR, Cole B, Bland Kl. Nonpalpable Breast Cancer in Women Aged 40-49 Years: A Surgeon’s View of Benefits From Screening Mammography. JNCI Monographs, Volume 1997 Issue 22, January 1997, Pages 145-149.
Seewaldt VL, Bernstein L. The perils of generalization: Rethinking breast cancer screening guidelines for young women of color. Cancer. 2021 Dec 1;127(23):4359-4361. doi: 10.1002/cncr.33840. Epub 2021 Aug 24. PMID: 34427914; PMCID: PMC8578311.