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  11. Initial Interpretation Scores Of Screening Mammograms And Cancer Detection In Breastscreen Norway

Initial interpretation scores of screening mammograms and cancer detection in BreastScreen Norway

Tone Hovda1, Silje Sagstad2, Nataliia Moshina2

  • 1Department of Radiology, Vestre Viken Hospital Trust, PO Box 800, 3004 Drammen, Norway.

European Journal of Radiology
|August 19, 2024

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Tracking the Mammary Architectural Features and Detecting Breast Cancer with Magnetic Resonance Diffusion Tensor Imaging
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View abstract on PubMed

Summary
This summary is machine-generated.

Radiologists' interpretation scores in mammographic screening correlate with recall and cancer detection rates. Higher scores indicate more recalls and cancers, but some cancers are missed with low scores, highlighting the need for careful interpretation.

Area of Science:

  • Radiology
  • Oncology
  • Medical Imaging

Background:

  • Mammographic screening is crucial for early breast cancer detection.
  • Radiologist interpretation scores are key performance indicators.
  • Understanding the relationship between interpretation scores, performance, and experience is vital.

Purpose of the Study:

  • To investigate the association between radiologists' interpretation scores, early performance metrics, and cumulative reading volume in mammographic screening.
  • To analyze how interpretation scores relate to recall rates, screen-detected cancers, and tumor characteristics.

Main Methods:

  • Analysis of 1,689,731 screening mammograms from BreastScreen Norway (2012-2020).
  • Two independent radiologists scored each breast on a scale of 1-5 (1=negative/benign, ≥2=positive).
Keywords:
BreastFemaleMammographyMass screening

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  • Descriptive analyses of recall, cancer detection, positive predictive value (PPV-1), mammographic features, and histopathology by interpretation scores and reading volume.

    • Main Results:

    • A score of ≥2 was assigned to 3.9% of breasts; 84.8% of these were score 2.
    • Recall rate was 1.6%, with 69.3% receiving a score of 2.
    • Screen-detected cancers (0.3%) showed increasing rates with higher combined scores (p<0.001).
    • Higher scores correlated with spiculated masses, invasive carcinoma, grade 3 tumors, and lymph node positivity (p<0.001).
    • The proportion of examinations scored 1 increased with cumulative reading volume.

    Conclusions:

    • Higher interpretation scores in mammography are associated with increased recall and screen-detected cancer rates.
    • High scores correlate with more aggressive tumor characteristics.
    • A significant number of recalls and detected cancers were associated with low interpretation scores, indicating potential for missed findings.
    Neoplasms