To examine the prognostic value of mammographic breast density (MBD) and mammographic features and their relationship with established prognostic factors in patients with invasive breast cancer.
Mammographic characteristics of 270 patients were analyzed. MBD was classified according to percentile density (<5 %, 5-10 %, 10-25 %, 25-50 %, 50-75 %, >75 %) and further categorized into very low density (VLD; <10 %), low density (LOD; <25 %) and mixed density (MID; >25 %). Mammographic features were compared with established prognostic factors and patient outcomes while correcting for possible confounders.
MBD was inversely associated with tumour grade (p = 0.019). Patients with LOD breasts had worse prognoses compared to those with MID breasts (disease-free survival 74.7 % vs. 84.8 %, p = 0.048; overall survival 75.3 % vs. 90.2 %, p = 0.003). Patients with VLD breasts showed the strongest significance compared to the remaining patients, even after adjusting for age, body mass index, and menopausal status. No other mammographic feature was prognostically significant. In Cox regression analysis, VLD proved to be an independent, poor prognostic feature (hazard ratio = 3.275; p < 0.001).
In patients with newly diagnosed breast cancer, very low MBD proved to be an independent prognostic feature, associated with higher tumour grade and predicted worse survival even after correcting for possible confounders.
• Percentile mammographic breast density was associated with patient prognosis.
• Very low density proved to be an independent poor prognostic factor.
• Only patients with densities <10 % displayed this difference in survival.
• Mammographic breast density was inversely associated with histological tumour grade.
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Mammographic breast density
Very low density
Body mass index
Human epidermal growth factor receptor 2
Breast Imaging-Reporting and Data System
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The scientific guarantor of this publication is Professor Ritva Vanninen. This work was supported in part by the Kuopio University Hospital EVO funding (grant nos. 5063525, 5063532), the Cancer Center of the University of Eastern Finland, the Cancer Foundation of Finland, the University of Kuopio Foundation and by a grant from Mauri and Sirkka Wiljasalo in 2014. The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article. Tuomas Selander kindly provided statistical advice for this manuscript. Institutional Review Board approval was obtained. Written informed consent was waived by the Institutional Review Board. Methodology: retrospective, performed at one institution. This manuscript was presented at the European Congress of Radiology (ECR) in 2014.
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Masarwah, A., Auvinen, P., Sudah, M. et al. Very low mammographic breast density predicts poorer outcome in patients with invasive breast cancer. Eur Radiol 25, 1875–1882 (2015). https://doi.org/10.1007/s00330-015-3626-2
- Breast neoplasms
- Mammographic density