Evidence map›Paper›PMID 32548671›Full record

ArticleChild's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery2020

Managing NF2-associated vestibular schwannomas in children and young adults: review of an institutional series regarding effects of surgery and bevacizumab on growth rates, tumor volume, and hearing quality.

Isabel Gugel, Julian Zipfel, Philip Hartjen, Lan Kluwe, Marcos Tatagiba, Victor-Felix Mautner, Martin Ulrich Schuhmann

Open access · hybridAbstract read
In one paragraph

Article in Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
0.8field-weighted citation impact, top 23% 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

11 citing papers in PubMed, 16 citations in OpenAlex.

  1. Review
  2. Review
  3. Article
  4. Article
  5. Review
  6. Article
  7. Intracranial paragangliomas versus schwannomas: Role of dynamic susceptibility contrast perfusion and diffusion MRI.Journal of neuroimaging : official journal of the American Society of Neuroimaging · 2022
    Article
  8. Article
  9. Article
  10. Article
  11. 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

7 authors at 2 institutions in 1 country.

Isabel GugelDepartment of Neurosurgery, University Hospital Tübingen, Tübingen, Germany. isabel.gugel@med.uni-tuebingen.de.ORCID http://orcid.org/0000-0003-2923-5949
Julian ZipfelDepartment of Neurosurgery, University Hospital Tübingen, Tübingen, Germany.
Philip HartjenDepartment of Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Lan KluweDepartment of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Marcos TatagibaDepartment of Neurosurgery, University Hospital Tübingen, Tübingen, Germany.
Victor-Felix MautnerCentre of Neurofibromatosis, Centre of Rare Disease, University Hospital Tübingen, Tübingen, Germany.
Martin Ulrich SchuhmannDepartment of Neurosurgery, University Hospital Tübingen, Tübingen, Germany.
University Children's Hospital Tübingen · DEUniversität Hamburg · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We reviewed our experience in managing of NF2-associated vestibular schwannoma (VS) in children and young adults regarding the effect of surgery and postoperative bevacizumab treatment. A total of 579 volumetric and hearing data sets were analyzed. The effect of surgery on tumor volume and growth rate was investigated in 46 tumors and on hearing function in 39 tumors. Long-term hearing follow-up behavior was compared with 20 non-operated ears in additional 15 patients. Sixteen operated VS were treated with bevacizumab. Mutation analysis of the NF2 gene was performed in 25 patients. Surgery significantly slowed down VS growth rate. Factors associated with a higher growth rate were increasing patient age, tumor volume, and constitutional truncating mutations. Immediately after surgery, functional hearing was maintained in 82% of ears. Deterioration of hearing was associated with initial hearing quality, larger tumor volumes, and larger resection amounts. Average hearing scores were initially better in the group of non-operated VS. Over time, hearing scores in both groups worsened with a similar dynamic. During bevacizumab treatment of residual tumors, four different patterns of growth were observed. Decompression of the internal auditory canal with various degrees of tumor resection decreases the postoperative tumor growth rates. Carefully tailored BAEP-guided surgery does not cause additional hearing deterioration. Secondary bevacizumab treatment showed heterogenous effects both regarding tumor size and hearing preservation. It seems that postoperative tumor residuals, that grow slower, behave differently to bevacizumab than reported for not-operated faster growing VS.

Indexed as

Neurofibromatosis 2Neuroma, AcousticBevacizumabChildGenes, Neurofibromatosis 2HearingHumansNeurofibromin 2Treatment OutcomeTumor BurdenYoung AdultBevacizumabNeurofibromin 2NF2 protein, humanBevacizumabGrowth rateHearing preservationNeurofibromatosis type 2SurgeryVestibular schwannoma

Identifiers

PMID32548671
PMCPMC7575489
OpenAlexW3035024472

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.