Evidence map›Paper›PMID 32464163›Full record

ArticleRadiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology2020

The risk for developing a secondary cancer after breast radiation therapy: Comparison of photon and proton techniques.

Harald Paganetti, Nicolas Depauw, Andrew Johnson, Rachel Beth Forman, Jackson Lau, Rachel Jimenez

Open access · greenAbstract read
In one paragraph

Article in Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
3.4field-weighted citation impact, top 6% 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

31 citing papers in PubMed, 53 citations in OpenAlex.

  1. Article
  2. Proton therapy in young breast cancer patients with germline TP53 and ATM mutations: a case series.Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al] · 2026
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  7. Radiation-induced malignancies from simultaneous integrated boost-VMAT for oropharyngeal cancer delivered with four different fractionation schemes.Reports of practical oncology and radiotherapy : journal of Greatpoland Cancer Center in Poznan and Polish Society of Radiation Oncology · 2026
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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

6 authors at 2 institutions in 1 country.

Harald PaganettiDepartment of Radiation Oncology, Massachusetts General Hospital, Boston, MA, United States; Harvard Medical School, Boston, MA, United States. Electronic address: hpaganetti@mgh.harvard.edu.
Nicolas DepauwDepartment of Radiation Oncology, Massachusetts General Hospital, Boston, MA, United States; Harvard Medical School, Boston, MA, United States.
Andrew JohnsonDepartment of Radiation Oncology, Massachusetts General Hospital, Boston, MA, United States.
Rachel Beth FormanDepartment of Radiation Oncology, Massachusetts General Hospital, Boston, MA, United States.
Jackson LauDepartment of Radiation Oncology, Massachusetts General Hospital, Boston, MA, United States.
Rachel JimenezDepartment of Radiation Oncology, Massachusetts General Hospital, Boston, MA, United States; Harvard Medical School, Boston, MA, United States.
Harvard University · USMassachusetts General Hospital · US

Funding

Project 3: Enhanced Sensitivity of Tumors to Proton Beam Therapy: Mechanisms and Biomarkers.P01CA261669 · NCI · MASSACHUSETTS GENERAL HOSPITAL · PI HONG, THEODORE S · 2021 to 2025
$14.0M
MDACC Clinical and Research Physics SupportU19CA021239 · NCI · MASSACHUSETTS GENERAL HOSPITAL · PI HONG, THEODORE S · 2014 to 2018
$11.2M
NCI NIH HHS P01 CA261669NCI NIH HHS U19 CA021239
6 · The paper itself

Abstract

background and purposeTo compare secondary malignancy risks of modern proton and photon therapy techniques for locally advanced breast cancer. METHODS AND MATERIALS: We utilized dosimetric data from 34 [10 photon-VMAT, 10 photon-3DCRT, 14 pencil beam scanning proton (PBS)] breast cancer patients who received comprehensive nodal irradiation. Employing a model based on organ equivalent dose to account for both inhomogeneous organ dose distributions and non-linear functional dose relationships, we estimated excess absolute risk, excess relative risk, and lifetime attributable risk (LAR) for secondary malignancies. The model uses dose distribution, number of fractions, age at exposure, attained age, the linear-quadratic dose response relationship for cell survival, repopulation factor, as well as gender specific age dependencies, and initial slopes of dose response curves.

resultsThe LAR for carcinoma at age 70 was estimated to be up to 3.64% for esophagus with an advantage of 3DCRT over PBS and VMAT. For the ipsilateral lung, risks were lowest for PBS (up to 5.56%), followed by 3DCRT (up to 6.54%) and VMAT (up to 7.7%). For the contralateral lung, there is a clear advantage of 3DCRT and PBS techniques (risk <0.86%) over VMAT (up to 4.4%). The risk for the contralateral breast is negligible for 3DCRT and PBS but was estimated as up to 1.2% for VMAT. Risks for the thyroid are overall negligible. Independently performed comparative treatment plans on 10 patients revealed that the risk for the contralateral lung and breast using VMAT can be more than an order of magnitude higher compared to PBS. Sarcoma risks were estimated as well showing similar trends but were overall lower compared to carcinoma.

conclusionConventional (3DCRT) techniques led to the lowest estimated risks of, thyroid and esophageal secondary cancers while PBS demonstrated a benefit for secondary lung and contralateral breast cancer risks, with the highest risks overall associated with VMAT techniques.

Indexed as

Breast NeoplasmsNeoplasms, Second PrimaryProton TherapyRadiotherapy, Intensity-ModulatedAgedHumansOrgans at RiskProtonsRadiotherapy DosageRadiotherapy Planning, Computer-AssistedProtonsBreast cancerOutcome modellingSecondary malignancies

Identifiers

PMID32464163
PMCPMC11293368
OpenAlexW3029290415

What OpenQuestion holds

Textmetadata
LicenceTDM
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.