Evidence map›Paper›PMID 33361408›Full record

SynthesisJournal of neurology, neurosurgery, and psychiatry2021

Medical treatment of SUNCT and SUNA: a prospective open-label study including single-arm meta-analysis.

Giorgio Lambru, Anker Stubberud, Khadija Rantell, Susie Lagrata, Erling Tronvik, Manjit Singh Matharu

Open access · bronzeAbstract readComparative StudyMeta-Analysis
In one paragraph

Synthesis in Journal of neurology, neurosurgery, and psychiatry, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 2 pooled it
2.4field-weighted citation impact, top 10% 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

20 citing papers in PubMed, 2 syntheses or guidelines pooled it, 47 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Article
  5. Review
  6. Hallmarks of primary headache: part 3 - cluster headache.The journal of headache and pain · 2025
    Review
  7. Review
  8. Facial pain in MS: When to think of trigeminal autonomic cephalalgia.Multiple sclerosis (Houndmills, Basingstoke, England) · 2024
    Article
  9. Review
  10. Article
  11. Sex differences in trigeminal neuralgia: a focus on radiological and clinical characteristics.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2023
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Trigeminal neuralgia: a practical guide.Practical neurology · 2021
    Review
  18. Article
  19. SUNHA: A Mystifying Cephalgia.Annals of Indian Academy of Neurology
    Article
  20. Article
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

6 authors at 3 institutions in 3 countries.

Giorgio LambruHeadache and Facial Pain Group, UCL Queen Square Institute of Neurology, London, UK.
Anker StubberudDepartment of Neuromedicine and Movement Sciences, Norwegian University of Science and Technology, Trondheim, Norway.
Khadija RantellEducation Unit, UCL Queen Square Institute of Neurology, London, UK.
Susie LagrataHeadache and Facial Pain Group, UCL Queen Square Institute of Neurology, London, UK.
Erling TronvikDepartment of Neuromedicine and Movement Sciences, Norwegian University of Science and Technology, Trondheim, Norway.
Manjit Singh MatharuHeadache and Facial Pain Group, UCL Queen Square Institute of Neurology, London, UK manjit.matharu@ucl.ac.uk.ORCID 0000-0002-4960-2294
Pain and Headache Center · USNorwegian University of Science and Technology · NOHealth Education England · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionThe management of short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT) and short-lasting unilateral neuralgiform headache attacks with cranial autonomic symptoms (SUNA) remains challenging in view of the paucity of data and evidence-based treatment recommendations are missing.

methodsIn this single-centre, non-randomised, prospective open-label study, we evaluated and compared the efficacy of oral and parenteral treatments for SUNCT and SUNA in a real-world setting. Additionally, single-arm meta-analyses of the available reports of SUNCT and SUNA treatments were conducted.

resultsThe study cohort comprised 161 patients. Most patients responded to lamotrigine (56%), followed by oxcarbazepine (46%), duloxetine (30%), carbamazepine (26%), topiramate (25%), pregabalin and gabapentin (10%). Mexiletine and lacosamide were effective in a meaningful proportion of patients but poorly tolerated. Intravenous lidocaine given for 7-10 days led to improvement in 90% of patients, whereas only 27% of patients responded to a greater occipital nerve block. No statistically significant differences in responders were observed between SUNCT and SUNA. In the meta-analysis of the pooled data, topiramate was found to be significantly more effective in SUNCT than SUNA patients. However, a higher proportion of SUNA than SUNCT was considered refractory to medications at the time of the topiramate trial, possibly explaining this isolated difference.

conclusionsWe propose a treatment algorithm for SUNCT and SUNA for clinical practice. The response to sodium channel blockers indicates a therapeutic overlap with trigeminal neuralgia, suggesting that sodium channels dysfunction may be a key pathophysiological hallmark in these disorders. Furthermore, the therapeutic similarities between SUNCT and SUNA further support the hypothesis that these conditions are variants of the same disorder.

Indexed as

Administration, OralAdolescentAdultAgedAnalgesicsAnesthetics, LocalAnticonvulsantsFemaleHumansInfusions, ParenteralMaleMiddle AgedProspective StudiesSUNCT SyndromeYoung AdultAnalgesicsAnesthetics, LocalAnticonvulsants

Identifiers

PMID33361408
PMCPMC7892380
OpenAlexW3116233806

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.