Evidence map›Paper›PMID 33659716›Full record

ArticleClinical and translational radiation oncology2021

Selection criteria for early breast cancer patients in the DBCG proton trial - The randomised phase III trial strategy.

Line Bjerregaard Stick, Ebbe Laugaard Lorenzen, Esben Svitzer Yates, Carmel Anandadas, Karen Andersen, Cynthia Aristei, Orla Byrne, Sandra Hol, Ingelise Jensen, Anna M Kirby and 9 more

Open access · goldAbstract read
In one paragraph

Article in Clinical and translational radiation oncology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
2.7field-weighted citation impact, top 7% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

21 citing papers in PubMed, 1 synthesis or guideline pooled it, 39 citations in OpenAlex.

  1. Guideline
  2. Trial
  3. Article
  4. Review
  5. Article
  6. Determinants of radiation dose to immune cells during breast radiotherapy.Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al] · 2025
    Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Review
  15. Article
  16. Particle radiotherapy for breast cancer.Frontiers in oncology · 2023
    Review
  17. Review
  18. Article
  19. Review
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

19 authors at 18 institutions in 6 countries.

Line Bjerregaard StickDepartment of Oncology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
Ebbe Laugaard LorenzenLaboratory of Radiation Physics, Odense University Hospital, Odense, Denmark.
Esben Svitzer YatesDepartment of Medical Physics, Aarhus University Hospital, Aarhus, Denmark.
Carmel AnandadasDepartment of Clinical Oncology, The Christie Hospital NHS Foundation Trust, Manchester, UK.
Karen AndersenDepartment of Radiotherapy, Herlev & Gentofte Hospital, Herlev, Denmark.
Cynthia AristeiDepartment of Medicine and Surgery, Radiation Oncology Section, University of Perugia & Perugia General Hospital, Perugia, Italy.
Orla ByrneDepartment of Medical Physics, Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK.
Sandra HolDepartment of Radiation Oncology, Institute Verbeeten, Tilburg, the Netherlands.
Ingelise JensenDepartment of Medical Physics, Aalborg University Hospital, Aalborg, Denmark.
Anna M KirbyDepartment of Radiotherapy, The Royal Marsden Hospital NHS Foundation Trust & Institute of Cancer Research, London, UK.
Youlia M KirovaDepartment of Radiation Oncology, Institut Curie, Paris, France.
Livia MarrazzoDepartment of Medical Physics, Careggi University Hospital, Florence, Italy.
Angela Matías-PérezDépartement de Radiothérapie, Institut Gustave Roussy, Villejuif, France.
Mette Marie Bruun NielsenDepartment of Oncology, Zealand University Hospital, Næstved, Denmark.
Henrik Dahl NissenDepartment of Oncology, Vejle Sygehus, Vejle, Denmark.
Sileida OliverosDepartment of Oncology, Oxford University Hospitals NHS Foundation Trust, Oxford, UK.
Karolien VerhoevenDepartment of Radiation Oncology (Maastro), GROW School for Oncology, Maastricht University Medical Centre, Maastricht, the Netherlands.
Johan VikströmDepartment of Radiotherapy, Stavanger University Hospital, Stavanger, Norway.
Birgitte Vrou OffersenDanish Centre for Particle Therapy, Aarhus University Hospital, Aarhus, Denmark.
Aarhus University Hospital · DKAalborg University Hospital · DKAzienda Ospedaliero-Universitaria Careggi · ITCambridge University Hospitals NHS Foundation Trust · GBGentofte Hospital · DKInstitut Curie · FRInstitut Gustave Roussy · FRInstituut Verbeeten · NLMaastricht University Medical Centre · NLOdense University Hospital · DKOxford University Hospitals NHS Trust · GBRigshospitalet · DKRoyal Marsden Hospital · GBStavanger University Hospital · NOThe Christie Hospital · GBUniversity of Perugia · ITVejle Sygehus · DKZealand University Hospital · DK

Funding

Cancer Research UK 28284
6 · The paper itself

Abstract

background and purposeAdjuvant radiotherapy of internal mammary nodes (IMN) improves survival in high-risk early breast cancer patients but inevitably leads to more dose to heart and lung. Target coverage is often compromised to meet heart/lung dose constraints. We estimate heart and lung dose when target coverage is not compromised in consecutive patients. These estimates are used to guide the choice of selection criteria for the randomised Danish Breast Cancer Group (DBCG) Proton Trial. MATERIALS AND

methods179 breast cancer patients already treated with loco-regional IMN radiotherapy from 18 European departments were included. If the clinically delivered treatment plan did not comply with defined target coverage requirements, the plan was modified retrospectively until sufficient coverage was reached. The choice of selection criteria was based on the estimated number of eligible patients for different heart and lung dose thresholds in combination with proton therapy capacity limitations and dose-response relationships for heart and lung.

resultsMedian mean heart dose was 3.0 Gy (range, 1.1-8.2 Gy) for left-sided and 1.4 Gy (0.4-11.5 Gy) for right-sided treatment plans. Median V17Gy/V20Gy (hypofractionated/normofractionated plans) for ipsilateral lung was 31% (9-57%). The DBCG Radiotherapy Committee chose mean heart dose ≥ 4 Gy and/or lung V17Gy/V20Gy ≥ 37% as thresholds for inclusion in the randomised trial. Using these thresholds, we estimate that 22% of patients requiring loco-regional IMN radiotherapy will be eligible for the trial.

conclusionThe patient selection criteria for the DBCG Proton Trial are mean heart dose ≥ 4 Gy and/or lung V17Gy/V20Gy ≥ 37%.

Indexed as

Breast cancerHeart and lung exposurePatient selectionProton therapy

Identifiers

PMID33659716
PMCPMC7892790
OpenAlexW3127544871

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.