Association of breast cancer risk, density, and stiffness: global tissue stiffness on breast MR elastography (MRE)

Bhavika K. Patel, Kay Pepin, Kathy R. Brandt, Gina L. Mazza, Barbara A. Pockaj, Jun Chen, Yuxiang Zhou, Donald W. Northfelt, Karen Anderson, Juliana M. Kling, Celine M. Vachon, Kristin R. Swanson, Mehdi Nikkhah, Richard Ehman

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: Quantify in vivo biomechanical tissue properties in various breast densities and in average risk and high-risk women using Magnetic Resonance Imaging (MRI)/MRE and examine the association between breast biomechanical properties and cancer risk based on patient demographics and clinical data. Methods: Patients with average risk or high-risk of breast cancer underwent 3.0 T breast MR imaging and elastography. Breast parenchymal enhancement (BPE), density (from most recent mammogram), stiffness, elasticity, and viscosity were recorded. Within each breast density group (non-dense versus dense), stiffness, elasticity, and viscosity were compared across risk groups (average versus high). Separately for stiffness, elasticity, and viscosity, a multivariable logistic regression model was used to evaluate whether the MRE parameter predicted risk status after controlling for clinical factors. Results: 50 average risk and 86 high-risk patients were included. Risk groups were similar in age, density, and menopausal status. Among patients with dense breasts, mean stiffness, elasticity, and viscosity were significantly higher in high-risk patients (N = 55) compared to average risk patients (N = 34; all p < 0.001). Stiffness remained a significant predictor of risk status (OR = 4.26, 95% CI [1.96, 9.25]) even after controlling for breast density, BPE, age, and menopausal status. Similar results were seen for elasticity and viscosity. Conclusion: A structurally based, quantitative biomarker of tissue stiffness obtained from MRE is associated with differences in breast cancer risk in dense breasts. Tissue stiffness could provide a novel prognostic marker to help identify high-risk women with dense breasts who would benefit from increased surveillance and/or risk reduction measures.

Original languageEnglish (US)
JournalBreast Cancer Research and Treatment
DOIs
StateAccepted/In press - 2022

Keywords

  • Breast MR imaging
  • Breast cancer risk
  • Breast elastography
  • Breast stroma
  • Breast tissue stiffness
  • Dense breasts

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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