Women <40 years old: Routine screening is not recommended due to the low incidence of breast cancer in this age group.
Women aged 40-49: Annual Screening Mammography is recommended. This age group tends to have higher breast density, which can make small early cancers harder to detect. Additionally, cancers in this age range have a tendency to grow more rapidly.
Women aged 50-74: Both the American College of Radiology/Society of Breast Imaging (ACR/SBI) and the National Comprehensive Cancer Network (NCCN) recommend annual Screening Mammography. The Canadian Association of Radiologists (CAR) recommends screening every 1-2 years (biennial). Insight also suggests strongly considering annual screening mammography, ensuring that women in this age group do not go longer than 2 years between screenings. Annual mammography has been shown to reduce the risk of breast cancer mortality, especially for those with dense breasts.
Women >74 years old: Both the ACR/SBI and the NCCN recommend continuing with annual Screening Mammography. The CAR recommends screening every 1-2 years (biennial). However, if a woman has severe comorbidities (medical problems) that are expected to limit her life expectancy, then screening mammography may not be recommended.