Evidence map›Paper›PMID 42257762›Full record

ArticleJournal of neuro-oncology2026

Risk factors and long-term outcomes in smart syndrome: a multicenter study.

Maria Bea Sintes, Gabriel Velilla-Alonso, Alejandro Herrero-San Martin, Jaime Gállego Pérez-Larraya, Jordi Estela-Herrero, Núria Riba Pagès, Carlota Jáuregui Larrañaga, Hugo Hernández Tost, Javier Cabello, Laura Pulido Fontes and 4 more

Abstract readMulticenter Study
PubMed Publisher
In one paragraph

Article in Journal of neuro-oncology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing 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

1 citing paper in PubMed.

  1. 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

14 authors.

Maria Bea SintesUnitat de Neuro-Oncologia, Hospital Universitari de Bellvitge- ICO Hospitalet- Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), C/Feixa Llarga S/N, L'Hospitalet del Llobregat, Barcelona, 08097, Spain.
Gabriel Velilla-AlonsoServicio de Neurología, Hospital Universitario 12 de Octubre, Madrid, Spain.
Alejandro Herrero-San MartinServicio de Neurología, Hospital Universitario 12 de Octubre, Madrid, Spain.
Jaime Gállego Pérez-LarrayaDepartamento de Neurología, Clínica Universidad de Navarra, Pamplona, Spain.
Jordi Estela-HerreroServei de Neurología, Hospital Parc Taulí, Sabadell, Spain.
Núria Riba PagèsServei de Neurología, Hospital Parc Taulí, Sabadell, Spain.
Carlota Jáuregui LarrañagaServicio de Neurología del Hospital Universitario de Donostia, San Sebastián, Spain.
Hugo Hernández TostServicio de Neurología, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain.
Javier CabelloServicio de Neurología Hospital Universitario y Politécnico La Fe, Valencia, Spain.
Laura Pulido FontesServicio de Neurología, Hospital Universitario de Navarra, Pamplona, Spain.
Cristina Izquierdo GraciaDepartament de Neurociències, Hospital Universitari Germans Trias i Pujol, Badalona, Spain.
Ibai Tamayo RodríguezServicio de Metodología. Navarrabiomed, Universidad Pública de Navarra (UPNA), IdiSNA, Pamplona, Spain.
Marta Simó *Unitat de Neuro-Oncologia, Hospital Universitari de Bellvitge- ICO Hospitalet- Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), C/Feixa Llarga S/N, L'Hospitalet del Llobregat, Barcelona, 08097, Spain. msimo@bellvitgehospital.cat.ORCID http://orcid.org/0000-0002-6787-1949
M Elena Erro Aguirre *Servicio de Neurología, Hospital Universitario de Navarra, Pamplona, Spain.

Funding

Instituto de Salud Carlos III (Co-funded by European Regional Development Fund. ERDF, a way to build Europe). PI24/01375
6 · The paper itself

Abstract

purposeSMART (Stroke-like migraine attacks after radiotherapy) is a rare, late-onset complication of cranial radiotherapy (RT) consisting in episodes of neurological dysfunction associated with migraine-type headaches. We aimed to identify factors associated with the severity of first SMART episode, recurrence and overall survival.

methodsWe retrospectively reviewed patients diagnosed with modified SMART criteria (2010-2023) from nine Spanish hospitals. Demographic, clinical, neuroimaging, treatment and outcome data were analyzed.

resultsThirty-one patients (48% females) were included. Median age at SMART diagnosis was 49 (16-80) years. Median latency after RT was 13 (1-36) years. Most patients had primary brain tumors (84%). Nearly half received focal RT (45%), 32 % whole-brain RT and 23% received both. Severe episodes occurred in 61% (n = 19): 13 met a single severity criterion (intensive care unit admission, n = 1; status epilepticus (SE), n = 1; long-lasting episode, n = 11), and six met multiple criteria. Male sex (OR = 6.5, p = 0.024) and longer latency between RT and SMART onset (OR = 1.15, p = 0.016) were independently associated with severe presentation. Recurrent episodes occurred in 45%. The presence of ictal cortical FLAIR hyperintensity (OR = 0.08, p < 0.032) and longer episode duration (OR = 0.92, p < 0.035) were linked to lower recurrence. SE and known tumor prognostic factors predicted poorer survival.

conclusionsThis study highlights the heterogeneous long-term outcome of SMART syndrome. Severe initial episodes are common, especially in males and those with longer RT latency. Cortical FLAIR hyperintensity and prolonged first episodes are associated with reduced recurrence risk, while SE has a negative impact on survival.

Indexed as

Brain NeoplasmsCranial IrradiationMigraine DisordersAdolescentAdultAgedAged, 80 and overFemaleFollow-Up StudiesHumansMaleMiddle AgedPrognosisRetrospective StudiesRisk FactorsYoung AdultCranial radiotherapyLong-term outcomesMigraineRecurrenceSMART

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Registered trials

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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.