Evidence map›Paper›PMID 33575829›Full record

ArticleInternational journal of clinical oncology2021

Clinical experience of convection-enhanced delivery (CED) of carboplatin and sodium valproate into the pons for the treatment of diffuse intrinsic pontine glioma (DIPG) in children and young adults after radiotherapy.

Elwira Szychot, David Walker, Peter Collins, Harpreet Hyare, Ananth Shankar, Alison Bienemann, Milo Hollingworth, Steven Gill

Abstract read
PubMed Publisher
In one paragraph

Article in International journal of clinical oncology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 2 pooled it
2.6field-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.

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

22 citing papers in PubMed, 2 syntheses or guidelines pooled it, 38 citations in OpenAlex.

  1. Protocols and safety profile of convection enhanced delivery in pediatric patients: a systematic review.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2026
    Pooled it
  2. Pediatric low-grade brainstem glioma: a review of current diagnosis and treatment paradigms in the molecular era.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2025
    Pooled it
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  8. Theranostic Intratumoral Convection-Enhanced Delivery ofJournal of nuclear medicine : official publication, Society of Nuclear Medicine · 2024
    Article
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  13. Fifty years of DIPG: looking at the future with hope.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2023
    Review
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  18. Convection-Enhanced Delivery in Children: Techniques and Applications.Advances and technical standards in neurosurgery · 2022
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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

8 authors at 5 institutions in 1 country.

Elwira SzychotOak Centre for Children and Young People, Royal Marsden NHS Foundation Trust Hospital, Sutton, UK.ORCID http://orcid.org/0000-0002-1598-7018
David WalkerHarley Street Children's Hospital, London, UK.
Peter CollinsHarley Street Children's Hospital, London, UK.
Harpreet HyareHarley Street Children's Hospital, London, UK.
Ananth ShankarHarley Street Children's Hospital, London, UK.
Alison BienemannFunctional Neurosurgery Group, Clinical Neurosciences, University of Bristol, Bristol, UK.
Milo HollingworthFunctional Neurosurgery Group, Clinical Neurosciences, University of Bristol, Bristol, UK.
Steven GillHarley Street Children's Hospital, London, UK. steven.gill@nbt.nhs.uk.
University of Bristol · GBUniversity College London Hospitals NHS Foundation Trust · GBBirmingham Children's Hospital · GBRoyal Marsden NHS Foundation Trust · GBUniversity of Nottingham · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeEffective treatment of diffuse intrinsic pontine glioma (DIPG) remains a formidable challenge due to inadequate penetration of the blood-brain barrier (BBB) by systemically administered chemotherapies. The BBB can be overcome by directly infusing drugs into pons using method of convection-enhanced delivery (CED). We describe our clinical experience and what we have learned about the safety and feasibility of treating DIPG with intermittent CED of carboplatin and sodium valproate to the pons through the Renishaw Drug Delivery System (RDDS).

methodsRetrospective review (2017-2020) of children with DIPG, who following radiotherapy, received compassionate treatment commencing 3.3-10 months post-diagnosis (median 4.9 months). They received up to 7 cycles of 3-6 weekly pontine infusions of carboplatin (0.12-0.18 mg/ml) and sodium valproate (14.4-28.8 mg/ml).

results13 children 3-19 years (mean 6.9 years) were treated. There were no surgical complications. With the exception of infusion channels blocking in one device, there were no adverse device effects. Two patients developed persistent 6th nerve palsies, which led to drug concentration reduction in the combination therapy. Subsequently infusion/ drug-related toxicities were transient. Tumour was controlled in pons in 10/13 patients. Median progression-free survival (PFS) was 13.0 months, while median overall survival (OS) was 15.3 months.

conclusionsUse of the RDDS was safe and well tolerated in all 13 patients. Treatment improved control of pontine disease resulting in longer PFS and OS and merits further evaluation in a clinical trial.

Indexed as

Antineoplastic AgentsDiffuse Intrinsic Pontine GliomaGliomaCarboplatinChildConvectionHumansPonsRetrospective StudiesValproic AcidYoung AdultAntineoplastic AgentsCarboplatinValproic AcidCarboplatinConvection-enhanced deliveryDIPGSodium valproate

Identifiers

PMID33575829
OpenAlexW3128442351

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.