Carotid web was described more than 50 years ago as an atypical fibromuscular dysplasia (FMD) subtype with highly supporting pathological evidence as intimal FMD. In the following decades, the transition from catheter angiography or digital subtraction angiography (DSA) to non-invasive imaging techniques and the dramatic decrease in pathological procedures contributed to the gradual loss of this information. Currently, attention on the carotid web has increased due to its association with cryptogenic ischemic stroke. In fact, the underlying hypothesis is that the morphological features of the carotid web may determine a thrombogenic potential with artery-to-artery embolism. The pathology of the carotid web allowed identification of small thrombi embedded in the web pouch, and the features of thrombi endovascularly retrieved from intracranial arteries are very similar. The diagnosis of carotid web is usually made by non-invasive techniques, such as computed tomography angiography, ultrasound, and magnetic resonance imaging, requiring the concordance of two different techniques for confirming the diagnosis. DSA is usually considered in cases of diagnostic uncertainty and when interventional treatment of ischemic stroke or carotid web is considered. Treatment options in symptomatic cases include medical therapy (single or dual antiplatelets) or interventional approach (surgery or stenting), but there are no randomized controlled trials about therapy. The main aim of this review is to present the current knowledge on carotid web, retrieving historical data and angiographic classifications of FMD, as well as to discuss the biological plausibility of the association with stroke in symptomatic cases and the need for an updated classification of FMD, together with prospective data.

Carotid web was described more than 50 years ago as an atypical fibromuscular dysplasia (FMD) subtype with highly supporting pathological evidence as intimal FMD. In the following decades, the transition from catheter angiography or digital subtraction angiography (DSA) to non-invasive imaging techniques and the dramatic decrease in pathological procedures contributed to the gradual loss of this information. Currently, attention on the carotid web has increased due to its association with cryptogenic ischemic stroke. In fact, the underlying hypothesis is that the morphological features of the carotid web may determine a thrombogenic potential with artery-to-artery embolism. The pathology of the carotid web allowed identification of small thrombi embedded in the web pouch, and the features of thrombi endovascularly retrieved from intracranial arteries are very similar. The diagnosis of carotid web is usually made by non-invasive techniques, such as computed tomography angiography, ultrasound, and magnetic resonance imaging, requiring the concordance of two different techniques for confirming the diagnosis. DSA is usually considered in cases of diagnostic uncertainty and when interventional treatment of ischemic stroke or carotid web is considered. Treatment options in symptomatic cases include medical therapy (single or dual antiplatelets) or interventional approach (surgery or stenting), but there are no randomized controlled trials about therapy. The main aim of this review is to present the current knowledge on carotid web, retrieving historical data and angiographic classifications of FMD, as well as to discuss the biological plausibility of the association with stroke in symptomatic cases and the need for an updated classification of FMD, together with prospective data.

Carotid web was described more than 50 years ago as an atypical fibromuscular dysplasia (FMD) subtype with highly supporting pathological evidence as intimal FMD. In the following decades, the transition from catheter angiography or digital subtraction angiography (DSA) to non-invasive imaging techniques and the dramatic decrease in pathological procedures contributed to the gradual loss of this information. Currently, attention on the carotid web has increased due to its association with cryptogenic ischemic stroke. In fact, the underlying hypothesis is that the morphological features of the carotid web may determine a thrombogenic potential with artery-to-artery embolism. The pathology of the carotid web allowed identification of small thrombi embedded in the web pouch, and the features of thrombi endovascularly retrieved from intracranial arteries are very similar. The diagnosis of carotid web is usually made by non-invasive techniques, such as computed tomography angiography, ultrasound, and magnetic resonance imaging, requiring the concordance of two different techniques for confirming the diagnosis. DSA is usually considered in cases of diagnostic uncertainty and when interventional treatment of ischemic stroke or carotid web is considered. Treatment options in symptomatic cases include medical therapy (single or dual antiplatelets) or interventional approach (surgery or stenting), but there are no randomized controlled trials about therapy. The main aim of this review is to present the current knowledge on carotid web, retrieving historical data and angiographic classifications of FMD, as well as to discuss the biological plausibility of the association with stroke in symptomatic cases and the need for an updated classification of FMD, together with prospective data.

BACKGROUND AND PURPOSE: Migraine has been shown to increase cerebral excitability, promote rapid infarct expansion into tissue with perfusion deficits, and result in larger infarcts in animal models of focal cerebral ischemia. Whether these effects occur in humans has never been properly investigated. METHODS: In a series of consecutive patients with acute ischemic stroke, enrolled in the setting of the Italian Project on Stroke at Young Age, we assessed acute as well as chronic infarct volumes by volumetric magnetic resonance imaging, and compared these among different subgroups identified by migraine status. RESULTS: A cohort of 591 patients (male, 53.8%; mean age, 37.5±6.4 years) qualified for the analysis. Migraineurs had larger acute infarcts than non-migraineurs (median, 5.9 cm³ [interquartile range (IQR), 1.4 to 15.5] vs. 2.6 cm³ [IQR, 0.8 to 10.1], P<0.001), and the largest volumes were observed in patients with migraine with aura (median, 9.0 cm³ [IQR, 3.4 to 16.6]). In a linear regression model, migraine was an independent predictor of increased log (acute infarct volumes) (median ratio [MR], 1.64; 95% confidence interval [CI], 1.22 to 2.20), an effect that was more prominent for migraine with aura (MR, 2.92; 95% CI, 1.88 to 4.54). CONCLUSIONS: These findings reinforce the experimental observation of larger acute cerebral infarcts in migraineurs, extend animal data to human disease, and support the hypothesis of increased vulnerability to ischemic brain injury in people suffering migraine.
Animals ; Brain Injuries ; Brain Ischemia ; Brain ; Cohort Studies ; Cortical Spreading Depression ; Humans ; Linear Models ; Magnetic Resonance Imaging ; Migraine Disorders ; Migraine with Aura ; Models, Animal ; Perfusion ; Risk Factors ; Stroke

Background: and Purpose This study aimed to investigate the effect of endovascular treatment (EVT, with or without intravenous thrombolysis [IVT]) versus IVT alone on outcomes in patients with acute ischemic stroke (AIS) and intracranial large vessel occlusion (LVO) attributable to cervical artery dissection (CeAD). Methods: This multinational cohort study was conducted based on prospectively collected data from the EVA-TRISP (EndoVAscular treatment and ThRombolysis for Ischemic Stroke Patients) collaboration. Consecutive patients (2015–2019) with AIS-LVO attributable to CeAD treated with EVT and/or IVT were included. Primary outcome measures were (1) favorable 3-month outcome (modified Rankin Scale score 0–2) and (2) complete recanalization (thrombolysis in cerebral infarction scale 2b/3). Odds ratios with 95% confidence intervals (OR [95% CI]) from logistic regression models were calculated (unadjusted, adjusted). Secondary analyses were performed in the patients with LVO in the anterior circulation (LVOant) including propensity score matching. Results: Among 290 patients, 222 (76.6%) had EVT and 68 (23.4%) IVT alone. EVT-treated patients had more severe strokes (National Institutes of Health Stroke Scale score, median [interquartile range]: 14 [10–19] vs. 4 [2–7], P<0.001). The frequency of favorable 3-month outcome did not differ significantly between both groups (EVT: 64.0% vs. IVT: 86.8%; ORadjusted 0.56 [0.24–1.32]). EVT was associated with higher rates of recanalization (80.5% vs. 40.7%; ORadjusted 8.85 [4.28–18.29]) compared to IVT. All secondary analyses showed higher recanalization rates in the EVT-group, which however never translated into better functional outcome rates compared to the IVT-group. Conclusion We observed no signal of superiority of EVT over IVT regarding functional outcome in CeAD-patients with AIS and LVO despite higher rates of complete recanalization with EVT. Whether pathophysiological CeAD-characteristics or their younger age might explain this observation deserves further research.