New Guidance for GPs on Supporting Women with High Breast Density
21 Nov 2025
Why it matters: Dense breast tissue can make it harder to detect early cancers on mammograms and is linked to a slightly higher risk of breast cancer. Around 40% of women screened are classified as BI-RADS category C (heterogeneously dense) and 10% as category D (extremely dense). Women in these categories are advised to consult their GP to discuss personalised risk and potential additional investigations.
Key points for GPs:
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Breast density is not related to breast appearance and can change over time.
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Risk assessment should consider family history, genetics, lifestyle factors, prior cancers, and breastfeeding history, alongside density.
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A shared, nuanced conversation is crucial to help women understand their estimated risk and available options.
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Breast density is a risk factor, but not the strongest one, so it should be considered alongside other factors.
Expert insight: Associate Professor Magdalena Simonis highlighted that dense tissue can obscure early cancers, making mammograms less effective in some women. Professor Jon Emery added that the guidance addresses a knowledge gap, ensuring women understand their density and potential need for additional imaging.
Program context: In 2023–24, about 1.95 million women aged 50–74 participated in BreastScreen Australia, covering around 52% of the eligible population. Breast density reporting is already implemented in some states, with a national rollout planned. The BreastScreen program has reduced breast cancer mortality by 50% since 1991.
Next steps: Women identified with dense breasts should be encouraged to speak with their GP about risk management and personalised follow-up, with decisions made collaboratively.
Source: Australian Government Department of Health, Disability and Ageing; BreastScreen Australia; RACGP.
