Download PDFPDF

Original research
Importance of quality in breast cancer screening practice – a natural experiment in Alberta, Canada
Compose Response

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.
Author Information
First or given name, e.g. 'Peter'.
Your last, or family, name, e.g. 'MacMoody'.
Your email address, e.g.
Your role and/or occupation, e.g. 'Orthopedic Surgeon'.
Your organization or institution (if applicable), e.g. 'Royal Free Hospital'.
Statement of Competing Interests


  • A rapid response is a moderated but not peer reviewed online response to a published article in a BMJ journal; it will not receive a DOI and will not be indexed unless it is also republished as a Letter, Correspondence or as other content. Find out more about rapid responses.
  • We intend to post all responses which are approved by the Editor, within 14 days (BMJ Journals) or 24 hours (The BMJ), however timeframes cannot be guaranteed. Responses must comply with our requirements and should contribute substantially to the topic, but it is at our absolute discretion whether we publish a response, and we reserve the right to edit or remove responses before and after publication and also republish some or all in other BMJ publications, including third party local editions in other countries and languages
  • Our requirements are stated in our rapid response terms and conditions and must be read. These include ensuring that: i) you do not include any illustrative content including tables and graphs, ii) you do not include any information that includes specifics about any patients,iii) you do not include any original data, unless it has already been published in a peer reviewed journal and you have included a reference, iv) your response is lawful, not defamatory, original and accurate, v) you declare any competing interests, vi) you understand that your name and other personal details set out in our rapid response terms and conditions will be published with any responses we publish and vii) you understand that once a response is published, we may continue to publish your response and/or edit or remove it in the future.
  • By submitting this rapid response you are agreeing to our terms and conditions for rapid responses and understand that your personal data will be processed in accordance with those terms and our privacy notice.
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.

Vertical Tabs

Other responses

Jump to comment:

  • Published on:
    Quality in breast cancer screening: the breast positioning matters
    • Juliana P Guimães, Researcher & physician Hospital das Clínicas da Universidade Federal de Goiás - Goiânia, GO, Brasil.
    • Other Contributors:
      • Leonardo R Soares, Researcher & physician

    Dear editor,

    We read the article by Yuan et al. with great interest, which highlights different quality criteria in two breast cancer screening models in Canada (1).

    Currently, mammographic screening for breast cancer is recommended by several medical institutions and government agencies (2,3), based on prospective studies that have shown reduced mortality and other favorable outcomes (4,5). However, in recent years, several authors have questioned the benefits of population screening due to the rates of overdiagnosis and overtreatment (6). Nevertheless, many of these questions are based in retrospective and population-based studies, whose methodological limitations restrict the extrapolation of data to the individualized clinical context.

    The study conducted by Yuan et al. addresses an important issue of mammographic screening: the quality of the exams. Even in Canada, a high-income country with a consolidated health system, there are significant differences in the quality of screening between the centralized system (Screen Test, Alberta Cancer Agency) and community radiology clinics (1). Throughout the article, the authors also discuss several aspects related to technical criteria, such as cancer detection rate and false positive rate. However, as in most similar studies, nothing is discussed about the clinical quality control of the tests performed on both models.
    Clinical quality control involves several criteria related to breast positioni...

    Show More
    Conflict of Interest:
    None declared.