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May 18, 2021/Neurosciences/Podcast

Vasculitis and Stroke Before Age 50: A Growing Concern (Podcast)

When to suspect vasculitis and how to treat it

The prevalence of stroke in young adults — those under age 50 — is on the rise. One reason is the increase in atherosclerotic risk factors in this population. Other etiologies include inherited thrombophilias and hypercoagulability disorders, valvular heart disease and — perhaps more notably —autoimmune causes such as vasculitis, which have been on the rise.

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The newest episode of Cleveland Clinic’s Neuro Pathways podcast reveals more about stroke in young patients. G. Abbas Kharal, MD, MPH, a cerebrovascular immunologist with Cleveland Clinic’s Neurological Institute, discusses:

  • How to classify cerebral vasculitis
  • When to refer a patient to a cerebrovascular immunologist
  • Brain biopsy, vessel wall imaging and other diagnostic tools
  • Pulse-dose steroids and other treatments
  • Effects of COVID-19 infection in this patient population

Click the podcast player above to listen to the episode now, or read on for a short edited excerpt. Check out more Neuro Pathways episodes at clevelandclinic.org/neuropodcast or wherever you get your podcasts.

Excerpt from the podcast

Dr. Kharal: When should we suspect vasculitis? It’s important to note when we have the right clinical presentation: a younger patient with headaches, subacute encephalopathy, a subacute decline, recurrent ischemic strokes that really don’t fit in one specific cerebrovascular territory, and other constitutional symptoms. That is when to think that there’s something inflammatory going on.

The initial tests that lead us to diagnose a vasculopathy are, first, a brain MRI showing that there are new ischemic infarcts, and then some sort of vessel imaging, be it a CTA or MRA, that can demonstrate if there is a vasculopathy at all. Often you’ll be able to identify large- and medium-sized vessels on a CTA or MRA. However, smaller vessels, particularly those that are a couple of hundred micrometers in diameter, the tertiary and quaternary branches, are better visualized on cerebral angiography or DSA [digital subtraction angiography].

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Once you have imaging showing vessel irregularities and CT or MRI evidence of new acute infarcts, you’ve established that there is some form of vasculopathy. But you still have not diagnosed whether or not it is inflammatory! That’s a common mistake I see clinicians make. Someone will do an angiogram and see vascular irregularities and say, “This is suggestive of vasculitis.” However, all we can tell on an angiogram or any vessel imaging is whether or not there is a vasculopathy.

The presence of vasculitis requires either an inflammatory CSF or tissue diagnosis — or, particularly in secondary causes, elevated inflammatory markers or other inflammatory signs and symptoms.

Once you’ve established a diagnosis of inflammatory vasculitis, that is when you want to further determine whether it is primary or secondary.

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