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Does A Hypoplastic A1 Segment Of The Circle Of Willis

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Posted on Fri, 4 Dec 2020
Question: Does a hypoplastic A1 segment of the Circle of Willis on MRA need follow up or reimaging?
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Answered by Dr. Dr. Erion Spaho (9 hours later)
Brief Answer:
Reevaluation if any new symptoms show up.

Detailed Answer:
Hello and welcome to "Ask a Doctor " service.

I have read your query.

Hypoplasia of one of the A1 segments is compensated by dominance other A1 segment that supplies the A2 segment, via the anterior communicating artery.

Following up with imaging is not necessary unless any neurological symptoms will be present, in such a scenario, an evaluation is necessary to understand correctly if something has changed in the circle of Willis circulation.

Evaluation and treatment of risk factors for thrombosis, stroke, etc. is necessary.

Discuss with your Neuologist these issues.

Hope you found the answer helpful.

Let me know if I can assist you further.
Above answer was peer-reviewed by : Dr. Yogesh D
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Answered by
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Dr. Dr. Erion Spaho

Neurologist, Surgical

Practicing since :2004

Answered : 4493 Questions

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Does A Hypoplastic A1 Segment Of The Circle Of Willis

Brief Answer: Reevaluation if any new symptoms show up. Detailed Answer: Hello and welcome to "Ask a Doctor " service. I have read your query. Hypoplasia of one of the A1 segments is compensated by dominance other A1 segment that supplies the A2 segment, via the anterior communicating artery. Following up with imaging is not necessary unless any neurological symptoms will be present, in such a scenario, an evaluation is necessary to understand correctly if something has changed in the circle of Willis circulation. Evaluation and treatment of risk factors for thrombosis, stroke, etc. is necessary. Discuss with your Neuologist these issues. Hope you found the answer helpful. Let me know if I can assist you further.