Evidence map›Paper›PMID 27832799›Full record

ArticleRadiation oncology (London, England)2016

Estimation of second cancer risk after radiotherapy for rectal cancer: comparison of 3D conformal radiotherapy and volumetric modulated arc therapy using different high dose fractionation schemes.

Daniel R Zwahlen, Laura I Bischoff, Günther Gruber, Marcin Sumila, Uwe Schneider

Registry-linked trialOpen access · goldAbstract read
In one paragraph

Article in Radiation oncology (London, England), 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02572362 (Estimation of Second Cancer Risk in Patients Planned With Different Radiotherapy Regimes for Rectal Cancer - A Planning Study and Model-based Analysis), which is not on this map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
3.1field-weighted citation impact, top 9% 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.

NCT02572362 completednot on this map

Estimation of Second Cancer Risk in Patients Planned With Different Radiotherapy Regimes for Rectal Cancer - A Planning Study and Model-based Analysis

TypeobservationalSponsorKantonsspital GraubündenRan2015 to 2016Enrolled25ConditionsNeoplasms, Second PrimaryArmsNo intervention in this retrospective study
3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 18 citations in OpenAlex.

  1. Incidence risk assessment of secondary cancer due to radiotherapy of women with rectal cancer using BEIR VII, EPA, and ICRP models.Reports of practical oncology and radiotherapy : journal of Greatpoland Cancer Center in Poznan and Polish Society of Radiation Oncology · 2023
    Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. 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

5 authors at 3 institutions in 1 country.

Daniel R ZwahlenDepartment of Radiation Oncology, Kantonsspital Graubuenden, Chur, Switzerland. daniel.zwahlen@gmx.ch.
Laura I BischoffDepartment of Physics, University of Zurich, Zurich, Switzerland.
Günther GruberInstitute of Radiotherapy, Klinik Hirslanden, Zurich, Switzerland.
Marcin SumilaInstitute of Radiotherapy, Klinik Hirslanden, Zurich, Switzerland.
Uwe SchneiderDepartment of Physics, University of Zurich, Zurich, Switzerland.
Klinik Hirslanden · CHKantonsspital Graubünden · CHUniversity of Zurich · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo investigate second cancer risk (SCR) comparing volumetric modulated arc therapy (VMAT) and 3D conformal radiotherapy (3DCRT) with different high dose fractionation schemes.

methodsVMAT and 3DCRT virtual treatment plans for 25 patients previously treated with radiotherapy for rectal cancer were evaluated retrospectively. Doses prescribed were 25 × 1.8 Gy and 5 × 5 Gy, respectively. SCR was estimated using a carcinogenesis model and epidemiological data for carcinoma and sarcoma induction. SCR was determined by lifetime attributable risk (LAR).

resultsMean excess LAR was highest for organs adjacent to the PTV. Total LAR for VMAT and 3DCRT was 2.3-3.0 and 2.0-2.7 %, respectively. For 5 × 5 Gy, LAR was 1.4-1.9 % for VMAT and 1.2-1.6 % for 3DCRT. Organ-specific excess LAR was significantly higher for VMAT, and highest for bladder and colon. Size and shape of the PTV influenced SCR and was highest for age ≤ 40 years. For a patient with an additional lifetime risk of 60 years, LAR was 10 % for 25 × 1.8 Gy and 6 % for 5 × 5 Gy.

conclusionsNo statistically significant difference was detected in SCR using VMAT or 3DCRT. For bladder and colon, organ-specific excess LAR was statistically lower using 3DCRT, however the difference was small. Compared to epidemiological data, SCR was smaller when using a hypofractionated schedule. SCR was 2 % higher at normal life expectancy.

trial registrationClinicalTrials.gov Identifier NCT02572362 . Registered 4 October 2015. Retrospectively registered.

Indexed as

AgedAged, 80 and overDose Fractionation, RadiationFemaleHumansMaleMiddle AgedNeoplasms, Radiation-InducedNeoplasms, Second PrimaryOrgans at RiskRadiotherapy, ConformalRadiotherapy, Intensity-ModulatedRadiotherapy Planning, Computer-AssistedRectal NeoplasmsRetrospective StudiesRiskIntensity-modulated radiotherapyRadiotherapyRectal cancerSecond malignanciesVolumetric-modulated arc therapy

Identifiers

PMID27832799
PMCPMC5103599
OpenAlexW2552722360

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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.