ModulePublishedclinician-educationstroke-escalationimaging

Moyamoya disease/syndrome — ischemic and hemorrhagic patterns, ‘puff of smoke’ vessels, and imaging workup (Advanced)

Advanced course: Moyamoya involves progressive narrowing of intracranial arteries with fragile collateral vessels. It can cause ischemic strokes/TIAs and also hemorrhage. Learn what it looks like and how CTA/MRA/angiography support diagnosis.

ClinicianCaregiver, SurvivorAdvanced24 minGrade 11

Educational only

Educational only — not medical advice.

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If a patient develops new or worsening stroke symptoms, reduced consciousness, seizure, severe headache, airway/swallowing danger, or unstable vital signs, activate emergency response and follow local stroke escalation protocols.

Key takeaways

  • Explain moyamoya as progressive intracranial narrowing with collateral vessels
  • Recognize that both ischemic and hemorrhagic events can occur
  • Explain imaging workup: MRI for infarcts, CTA/MRA for stenosis/collaterals, angiography for detail
  • Know questions about recurrence risk and follow-up

Why this matters

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Clinical frame

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Core clinical idea

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Assessment and workup

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Clinical reasoning pathway

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Management and team actions

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Common pitfalls

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Patient-safe explanation

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Escalation and safety signals

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Applied case

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Clinical scenario

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Common misconceptions

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Reflect

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Key takeaways

  • Understand moyamoya as progressive intracranial narrowing with collateral vessels
  • Advanced stroke care requires reconciling the clinical syndrome with timing, imaging, medication risk, patient context, and local pathway capacity.
  • A safe plan names escalation thresholds, responsible clinicians, patient-facing instructions, and the next step if results or symptoms change.

Practice check

What you’ll practice

These questions are untimed. After you answer all of them, you’ll see your score and a clear next lesson or reference step.

0 of 4 answered

Question 1

1. A learner is applying this lesson on Moyamoya disease/syndrome — ischemic and hemorrhagic patterns, ‘puff of smoke’ vessels, and imaging workup. Which approach best reflects advanced clinical reasoning?

Question 2

2. Which actions show safe handling of Moyamoya disease/syndrome — ischemic and hemorrhagic patterns, ‘puff of smoke’ vessels, and imaging workup? Select all that apply.

Question 3

3. Place the safe clinical sequence for Moyamoya disease/syndrome — ischemic and hemorrhagic patterns, ‘puff of smoke’ vessels, and imaging workup in order.

Question 4

4. For Moyamoya disease/syndrome — ischemic and hemorrhagic patterns, ‘puff of smoke’ vessels, and imaging workup, a normal or non-specific early test result is enough to stop reassessment when the clinical syndrome still suggests risk.

References

  1. Tier 2RadiologyInfo.org2025
    CT Angiography of the Head
  2. Tier 2RadiologyInfo.org2025
    Magnetic Resonance Imaging (MRI) - Head