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Neurology. 2012 Sep 18;79(12):1208-14. doi: 10.1212/WNL.0b013e31826aacac. Epub 2012 Sep 5.

Silent ischemic lesions in young adults with first stroke are associated with recurrent stroke.

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  • 1Cerebrovascular Disease Centre, Centre Hospitalier de l’Universite´ de Montre´al, Notre-Dame Hospital, Faculty of Medicine, Universite´ de Montre´al, Montre´al, Canada.



To determine the association between silent ischemic lesions (SILs) on baseline brain MRI and recurrent stroke in young adults with first-ever ischemic stroke.


This was a single-center retrospective study of adult patients aged 18-50 years with first-ever ischemic stroke investigated by brain MRI between 2002 and 2009. Silent brain infarcts (SBIs) were defined as focal T2 hyperintensities ≥ 3 mm without corresponding focal symptoms, and leukoaraiosis was defined as focal, multifocal, or confluent hyperintensities on T2-weighted sequences. The primary outcome was recurrent stroke. A forward stepwise Cox regression model was used to determine whether SILs were independently associated with recurrent stroke.


A total of 271 eligible patients were identified in the database: 89 did not undergo MRI imaging and 12 patients had inadequate follow-up, leaving a study population of 170 patients. MRI demonstrated SILs in 48 of 170 (28.2) patients. No patients had isolated leukoaraiosis. Hypertension (p = 0.049), migraine with aura (p = 0.02), and cardiovascular disease (p = 0.04) were associated with SIL. Mean follow-up duration was 25 ± 7 months. Among patients with SILs, 11 of 48 (23%) had a recurrent stroke vs 8 of 122 (6.5%) patients without SIL (p = 0.003). After multivariate Cox regression, SILs remained independently associated with recurrent stroke (hazard ratio [HR] 3.2, 95% confidence interval [CI] 1.2-8.6, p = 0.02), as did the combination of SBIs and leukoaraiosis (HR 7.3, 95% CI 2.3-22.9, p = 0.003).


In adults ≤ 50 years old with first-ever ischemic stroke, SILs are common and independently predict recurrent stroke.

[PubMed - indexed for MEDLINE]
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