What is the recommended schedule for breast cancer screening in average-risk women?

Breast cancer screening guidelines vary by organization but generally include: (1) Average-risk women: USPSTF 2024 update recommends biennial screening mammograms starting at age 40 (lowered from 50 in 2024 update); ACS recommends annual screening starting at 45, with option to start at 40, then biennial after 54; ACR recommends annual starting at 40. (2) Higher-risk women (family history, prior breast cancer, BRCA mutations, chest radiation): earlier screening, MRI in addition to mammography. (3) Stopping: USPSTF says insufficient evidence after 75; many recommendations consider life expectancy. Clinical Breast Exam (CBE): performed by clinicians during physicals; effectiveness debated; ACS removed routine CBE recommendation in 2015. Breast self-exam (BSE) — historically taught as routine practice, but evidence does not support reducing mortality; current recommendation is 'breast awareness' — knowing what is normal and reporting changes (lumps, dimpling, nipple discharge, skin changes). Concerns about mammography: false positives (additional imaging, biopsies, anxiety); overdiagnosis (detecting cancers that would not have become symptomatic); radiation exposure (very low dose). Benefits: reduced breast cancer mortality; earlier detection allows less aggressive treatment. The trade-offs and individual risk profile inform screening decisions. Shared decision-making between provider and patient is increasingly emphasized. Nurses help patients understand screening options and address barriers.