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Related Experiment Videos

Benign versus malignant solid breast masses: US differentiation.

G Rahbar1, A C Sie, G C Hansen

  • 1Iris Cantor Center for Breast Imaging, Department of Radiological Sciences, UCLA School of Medicine 90095-6952, USA.

Radiology
|December 2, 1999
PubMed
Summary
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Certain ultrasonographic (US) features can help differentiate benign from malignant breast masses. However, interpreter variability necessitates further study before widespread application for deferring biopsies.

Area of Science:

  • Radiology
  • Medical Imaging
  • Oncology

Background:

  • Solid breast masses require accurate differentiation between benign and malignant types.
  • Ultrasonography (US) is a key imaging modality for breast lesion assessment.
  • Standardized criteria for US-based differentiation are crucial for clinical decision-making.

Purpose of the Study:

  • To evaluate the general applicability of specific ultrasonographic features for distinguishing benign from malignant solid breast masses.
  • To assess the interobserver variability among radiologists in applying these US criteria.

Main Methods:

  • Retrospective review of 162 solid breast masses with confirmed tissue diagnosis.
  • Three radiologists independently assessed US features without clinical or histologic information.

Related Experiment Videos

  • Analysis of specific US characteristics such as shape, margin, and dimension ratio.

    • Main Results:

    • Round/oval shape, circumscribed margins, and width-to-anteroposterior (AP) ratio > 1.4 were indicative of benign masses (94%, 91%, 89% respectively).
    • Irregular shape, microlobulated/spiculated margins, and width-to-AP ratio ≤ 1.4 suggested malignancy (61%, 67%, 40% respectively).
    • Strict application of key criteria could increase cancer biopsy yield by 16%, but US contribution was not significant when combined with mammography.

    Conclusions:

    • Specific ultrasonographic features demonstrate potential in differentiating benign from malignant solid breast masses.
    • Significant interobserver variability exists, requiring further investigation before widespread adoption for biopsy deferral.
    • The findings underscore the need for standardized training and validation of US criteria in clinical practice.