Evidence map›Paper›PMID 39349043›Full record

ReviewPractical neurology2025

Repeat expansion disorders.

Zhongbo Chen, Huw R Morris, James Polke, Nicholas W Wood, Sonia Gandhi, Mina Ryten, Henry Houlden, Arianna Tucci

Abstract readReview
In one paragraph

Review in Practical neurology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
–field-weighted citation impact
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

14 citing papers in PubMed.

  1. Article
  2. Technologies for engineering repetitive DNA.Quantitative biology (Beijing, China) · 2026
    Review
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  6. Article
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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.

Zhongbo ChenDepartment of Clinical and Movement Neuroscience, University College London Queen Square Institute of Neurology, London, UK zhongbo.chen@ucl.ac.uk mr2022@cam.ac.uk.ORCID http://orcid.org/0000-0001-6668-7202
Huw R MorrisDepartment of Clinical and Movement Neuroscience, University College London Queen Square Institute of Neurology, London, UK.ORCID http://orcid.org/0000-0002-5473-3774
James PolkeThe Neurogenetics Laboratory, National Hospital for Neurology and Neurosurgery, University College London Hospitals NHS Foundation Trust, London, UK.
Nicholas W WoodDepartment of Clinical and Movement Neuroscience, University College London Queen Square Institute of Neurology, London, UK.
Sonia GandhiDepartment of Clinical and Movement Neuroscience, University College London Queen Square Institute of Neurology, London, UK.
Mina Ryten *UK Dementia Research Institute at University of Cambridge, Cambridge, UK zhongbo.chen@ucl.ac.uk mr2022@cam.ac.uk.
Henry Houlden *Department of Neuromuscular Disease, University College London Queen Square Institute of Neurology, London, UK.ORCID http://orcid.org/0000-0002-2866-7777
Arianna Tucci *William Harvey Institute, Queen Mary University of London, London, UK.

Funding

Wellcome Trust
6 · The paper itself

Abstract

An increasing number of repeat expansion disorders have been found to cause both rare and common neurological disease. This is exemplified in recent discoveries of novel repeat expansions underlying a significant proportion of several late-onset neurodegenerative disorders, such as CANVAS (cerebellar ataxia, neuropathy and vestibular areflexia syndrome) and spinocerebellar ataxia type 27B. Most of the 60 described repeat expansion disorders to date are associated with neurological disease, providing substantial challenges for diagnosis, but also opportunities for management in a clinical neurology setting. Commonalities in clinical presentation, overarching diagnostic features and similarities in the approach to genetic testing justify considering these disorders collectively based on their unifying causative mechanism. In this review, we discuss the characteristics and diagnostic challenges of repeat expansion disorders for the neurologist and provide examples to highlight their clinical heterogeneity. With the ready availability of clinical-grade whole-genome sequencing for molecular diagnosis, we discuss the current approaches to testing for repeat expansion disorders and application in clinical practice.

Indexed as

DNA Repeat ExpansionNeurodegenerative DiseasesTrinucleotide Repeat ExpansionGenetic TestingHumansCEREBELLAR ATAXIAGENETICSMOLECULAR BIOLOGYNEUROGENETICS

Identifiers

PMID39349043
PMCPMC12128761

What Socratic 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 Socratic graph.