Evidence map›Paper›PMID 34285941›Full record

ArticleInternational journal of particle therapy2021

A Systematic Review of Proton Therapy for the Management of Nasopharyngeal Cancer.

Anna Lee, Sarin Kitpanit, Marina Chilov, Johannes A Langendijk, Jiade Lu, Nancy Y Lee

Open access · diamondAbstract read
In one paragraph

Article in International journal of particle therapy, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
2.9field-weighted citation impact, top 8% 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

17 citing papers in PubMed, 23 citations in OpenAlex.

  1. Proton Versus Photon Radiation Therapy for Nasopharyngeal Carcinoma.Journal of neurological surgery. Part B, Skull base · 2026
    Article
  2. Observational
  3. Review
  4. Insights from initial experience for nasopharyngeal carcinoma patients treated with proton therapy.Technical innovations & patient support in radiation oncology · 2025
    Article
  5. Article
  6. Article
  7. Review
  8. Article
  9. Quality of life in patients with nasopharyngeal carcinoma receiving IMRT vs IMPT: a multicenter prospective longitudinal study.Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer · 2024
    Article
  10. Precision radiotherapy for nasopharyngeal carcinoma.Precision radiation oncology · 2024
    Review
  11. Article
  12. Article
  13. Review
  14. Review
  15. Article
  16. Review
  17. 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

6 authors at 5 institutions in 4 countries.

Anna LeeDepartment of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA.
Sarin KitpanitDivision of Radiation Oncology, Department of Radiology, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand.
Marina ChilovMedical Library, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
Johannes A LangendijkDepartment of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
Jiade LuDepartment of Radiation Oncology, Shanghai Proton and Heavy Ion Center, Shanghai Cancer Hospital, Fudan University, Shanghai, China.
Nancy Y LeeDepartment of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
Memorial Sloan Kettering Cancer Center · USChulalongkorn University · THFudan University Shanghai Cancer Center · CNThe University of Texas MD Anderson Cancer Center · USUniversity Medical Center Groningen · NL

Funding

X-RAY CRYSTALLOGRAPHYP30CA008748 · NCI · SLOAN-KETTERING INSTITUTE FOR CANCER RES · PI Nicholas D Socci · 1985 to 2026
$347.4M
Fellow and Resident Radiation Oncology iNtensive Training in Imaging and Informatics to Empower Research Careers (FRONTI2ER)R25EB025787 · NIBIB · UNIVERSITY OF TX MD ANDERSON CAN CTR · PI DAS, PRAJNAN, FULLER, CLIFTON DAVID · 2018 to 2022
$535k
NCI NIH HHS P30 CA008748NIBIB NIH HHS R25 EB025787
6 · The paper itself

Abstract

purposeWith improved technology, more patients with nasopharyngeal cancer (NPC) are receiving definitive treatment with proton therapy, which allows greater sparing of dose to normal tissues without compromising efficacy. As there is no randomized data, the purpose of this study was to systematically review the available literature on proton therapy in this setting, focusing on the toxicity endpoints. MATERIALS AND

methodsA systematic search using PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines was conducted in 5 databases: PubMed, Embase, SCOPUS, Web of Science, and the Cochrane Central Register of Controlled Trials. A total of 491 studies were found on the topic of NPC and proton therapy. Following independent study selection by 2 investigators, 9 studies were found to have sufficient focus and relevance to be incorporated into the systematic review.

resultsAll 9 studies were retrospective and examined only NPC patients except for one that also included paranasal sinus cancer. One study was a reirradiation study. Four studies used 3D or double scatter technique, while all others used intensity-modulated proton therapy. Oncologic outcomes were similar to intensity-modulated radiation therapy (IMRT) rates, with 2-year local and regional progression-free survival (LRFS) ranging from 84% to 100%, 2-year progression-free survival (PFS) ranging from 75% to 88.9%, and 2-year overall survival (OS) ranging from 88% to 95% in the up-front setting. Four comparison studies with IMRT found significantly lower feeding tube rates (20% versus 65%,

conclusionsNPC patients receiving proton therapy maintain good outcomes with improved toxicity profile, likely due to sparing of dose to normal structures. Prospective studies are ongoing to better quantify the magnitude.

Indexed as

nasopharyngeal cancerproton therapysystematic review

Identifiers

PMID34285941
PMCPMC8270076
OpenAlexW3176305914

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.