Evidence map›Paper›PMID 18217207›Full record

ArticleJournal of neuro-oncology2008

The positive predictive value of O-(2-[18F]fluoroethyl)-L-tyrosine (FET) PET in the diagnosis of a glioma recurrence after multimodal treatment.

J H Mehrkens, G Pöpperl, W Rachinger, J Herms, K Seelos, K Tatsch, J C Tonn, F W Kreth

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In one paragraph

Article in Journal of neuro-oncology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 1 pooled it
4.3field-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

33 citing papers in PubMed, 1 synthesis or guideline pooled it, 114 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Trial
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  13. Evaluation of factors influencingNeuroImage. Clinical · 2018
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  14. TSPO PET for glioma imaging using the novel ligandEuropean journal of nuclear medicine and molecular imaging · 2017
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  15. Article
  16. Journal of neuro-oncology · 2017
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  17. The prognostic value of FET PET at radiotherapy planning in newly diagnosed glioblastoma.European journal of nuclear medicine and molecular imaging · 2017
    Article
  18. Review
  19. Article
  20. Review
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

8 authors at 1 institution in 1 country.

J H MehrkensDepartment of Neurosurgery, Klinikum Grosshadern, University of Munich, Munich, Germany.
G Pöpperl
W Rachinger
J Herms
K Seelos
K Tatsch
J C Tonn
F W Kreth
Ludwig-Maximilians-Universität München · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo explore prospectively the positive predictive value of O-(2-[(18)F]fluoroethyl)-L-tyrosine (FET)-PET in selected patients with a magnetic resonance imaging (MRI)-based suspicion of a glioma recurrence or progression. Methods Patients with a supratentorial glioma (initial World Health Organization (WHO) grade II, III or IV) were considered eligible if they had both an MRI-(new/progressive contrast-enhancing lesion) and FET-PET-based diagnosis of a recurrence/progression after various forms and combinations of irradiation and chemotherapy. Criterion for tumour recurrence/progression in FET-PET was a standardized uptake value (SUVmax)/Background (BG) ratio of >2.0 in the late uptake phase. All patients underwent multimodal (MRI, FET-PET) imaging-guided stereotactic biopsy. The positive predictive value was defined as the proportion of MRI and FET-PET findings indicating glioma recurrence/progression that also tested positive for tumour recurrence/progression after stereotactic biopsy.

resultsThirty-one patients with initially WHO grade II (17), WHO grade III (6), and grade IV glioma (8) were included. In 26 patients FET-PET results indicating tumour recurrence/progression were concordant with the biopsy results. In five patients histopathologic evaluation failed to reveal a "vital" tumour. FET-PET findings were also discordant with the radiographic and clinical follow-up in these five patients. The positive predictive value of FET-PET was 84%.

conclusionThe positive predictive value of FET-PET using the standard ratio method is high, but not high enough to replace stereotactic biopsy in this highly selected study cohort. Whether the calculation of FET uptake in the early phase and/or the evaluation of uptake kinetics will improve the positive predictive value of FET-PET deserves prospective evaluation.

Indexed as

RadiopharmaceuticalsAdultAgedBiopsyBrain NeoplasmsCell ProliferationCombined Modality TherapyDisease ProgressionFemaleGliomaHumansKi-67 AntigenMagnetic Resonance ImagingMaleMiddle AgedPositron-Emission TomographyKi-67 AntigenO-(2-fluoroethyl)tyrosineRadiopharmaceuticalsTyrosine

Identifiers

PMID18217207
OpenAlexW1966464074

What OpenQuestion holds

Textmetadata
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.