Evidence map›Paper›PMID 35128087›Full record

ReviewClinical and translational radiation oncology2022

Dose-volume predictors of post-radiation primary hypothyroidism in head and neck cancer: A systematic review.

James C H Chow, Ka-Man Cheung, Gavin T C Cheung, Anthony H P Tam, Jeffrey C F Lui, Francis K H Lee, Kwok-Hung Au, Wai-Tong Ng, Anne W M Lee, Harry H Y Yiu

Open access · goldAbstract readReview
In one paragraph

Review in Clinical and translational radiation oncology, 2022. 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
5.0field-weighted citation impact, top 3% 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, 26 citations in OpenAlex.

  1. Article
  2. Review
  3. Thyroid dose guidance in elective supraclavicular breast radiotherapy: a national survey of practice patterns in Switzerland.Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al] · 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

10 authors at 3 institutions in 2 countries.

James C H ChowDepartment of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong SAR, China.
Ka-Man CheungDepartment of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong SAR, China.
Gavin T C CheungDepartment of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong SAR, China.
Anthony H P TamDepartment of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong SAR, China.
Jeffrey C F LuiDepartment of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong SAR, China.
Francis K H LeeDepartment of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong SAR, China.
Kwok-Hung AuDepartment of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong SAR, China.
Wai-Tong NgDepartment of Clinical Oncology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.
Anne W M LeeDepartment of Clinical Oncology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.
Harry H Y YiuDepartment of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong SAR, China.
Queen Elizabeth Hospital · CNHong Kong Sanatorium and Hospital · HKUniversity of Hong Kong - Shenzhen Hospital · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeThis systematic review aims to identify radiation dose-volume predictors of primary hypothyroidism after radiotherapy in patients with head and neck cancer (HNC). MATERIALS AND

methodsWe performed a systematic literature search of Medline, EMBASE and Web of Science from database inception to July 1, 2021 for articles that discuss radiation dose-volume predictors of post-radiation primary hypothyroidism in patients with HNC. Data on the incidence, clinical risk factors and radiation dose-volume parameters were extracted. A meta-analysis was performed using the random-effects model to estimate the pooled odds ratio (OR) of thyroid volume as a predictor of the risk of post-radiation hypothyroidism, adjusted for thyroid radiation dosimetry.

resultsOur search identified 29 observational studies involving 4,530 patients. With median follow-up durations ranging from 1.0 to 5.3 years, the average crude incidence of post-radiation primary hypothyroidism was 41.4 % (range, 10 %-57 %). Multiple radiation dose-volume parameters were associated with post-radiation primary hypothyroidism, including the thyroid mean dose (Dmean), minimum dose, V25, V30, V35, V45, V50, V30-60, VS45 and VS60. Thyroid Dmean and V50 were the most frequently proposed dosimetric predictors. The pooled adjusted OR of thyroid volume on the risk of post-radiation primary hypothyroidism was 0.89 (95 % confidence interval, 0.85-0.93; p < 0.001) per 1 cc increment.

conclusionPost-radiation primary hypothyroidism is a common late complication after radiotherapy for HNC. Minimizing inadvertent exposure of the thyroid gland to radiation is crucial to prevent this late complication. Radiation dose-volume constraints individualized for thyroid volume should be considered in HNC radiotherapy planning.

Indexed as

3DRT, dimensional radiotherapyCI, confidence intervalCT, computer tomographyDmean, mean doseDmin, minimum doseHead and neck neoplasmsHNC, head and neck cancerHypothyroidismIMRT, intensity modulated radiotherapyNPC, nasopharyngeal cancerNTCP, normal tissue complication probabilityOPC, oropharyngeal cancerOR, odds ratioPRIMSA, Preferred Reporting Items for Systematic Reviews and meta-AnalysesQUANTEC, Quantitative Analysis of The Normal Tissue Effects in the ClinicRadiotherapyROC, receiver operating curveSurvivorshipTSH, thyroid stimulating hormoneULN, upper limit of normalVSx, thyroid volume that is spared from x Gy of radiation doseVx, thyroid volume that receives x Gy of radiation dose

Identifiers

PMID35128087
PMCPMC8807951
OpenAlexW4206952550

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.