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Related Experiment Videos

[Errors in mammography. II. False positives].

S Catarzi1, D Morrone, D Ambrogetti

  • 1Centro per lo Studio e la Prevenzione Oncologica, Firenze.

La Radiologia Medica
|March 1, 1992
PubMed
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Mammography demonstrated high specificity (99.5%) and positive predictive value (83%) for detecting breast cancer. However, diagnostic accuracy varied by age and reader interpretation, suggesting limited room for further improvement.

Area of Science:

  • Radiology
  • Oncology
  • Diagnostic Imaging

Background:

  • Mammography is a key tool for breast cancer screening.
  • False positives in mammography lead to unnecessary patient anxiety and biopsies.

Purpose of the Study:

  • To evaluate the specificity and positive predictive value of mammography.
  • To analyze the causes of false positives and factors influencing diagnostic accuracy.

Main Methods:

  • Retrospective analysis of 261 consecutive mammographic false positives from 1985-1987.
  • Histological confirmation of benign lesions in all false positive cases.
  • Comparison with cancer incidence and total mammographic examinations.

Main Results:

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  • Mammography achieved 99.5% specificity and 83% positive predictive value.
  • False positives were primarily due to asymmetric densities and circumscribed opacities.
  • Diagnostic accuracy was lower in younger women and influenced by the reader's interpretative approach.

    • Conclusions:

    • Further significant improvements in mammography's specificity and positive predictive value are unlikely.
    • The benign-to-malignant biopsy ratio of 0.2:1 for suspicious cases is considered satisfactory.