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Can MRA explain right-eye vision loss and right headaches?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

I am looking for a detailed read and interpretation of the MRA. Please be as detailed as possible with any abnormal findings you may see. My symptoms are progressive vision loss in the right eye, temporal headaches, and tenderness on the right side, headache on back of the head (right side), scissoring reflex via retinoscopy. I have attached my files.

Please help.

Thank you.

Answered by Dr. Vivek Chail

Hello,

Welcome to icliniq.com.

I have seen your reports. (Attachment removed to protect patient identity). Magnetic resonance (MR) arteriogram shows: The intracranial parts of both internal carotid arteries appear normal in caliber. There is hypoplasia of the A1 segment of the right anterior cerebral artery. The proximal left anterior and bilateral middle cerebral arteries, and the arteries of the circle of Willis, are normal in caliber.

The right posterior cerebral artery is hypoplastic. The vertebral, basilar, and left posterior cerebral arteries and their branches appear normal. No aneurysm, dissection, or vascular malformation. There is no obvious vascular looping around the bilateral trigeminal nerves in the cisternal parts in the given images.

I hope this helps.

Thank you.

Patient's Query

Thank you doctor,

  1. Do any of the above findings cause the symptoms mentioned above?
  2. What symptoms would one get, based on those findings?
  3. Also, can you explain what both these mean?

There is hypoplasia of the A1 segment of the right anterior cerebral artery. The right posterior cerebral artery is hypoplastic.

Please help.

Thank you.

Answered by Dr. Vivek Chail

Hello,

Welcome back to icliniq.com.

The word hypoplasia is a general term used in medicine for any structure which is smaller or narrower than the usual population and is from birth. In this case hypoplasia of the arteries means that the artery lumen is narrower than expected. In isolation, this is not necessarily a serious condition or a disease, but the hypoplastic A1 segment or PCA (posterior cerebral artery) can at times cause an increased tendency to neurological conditions. Some researches have maintained that the A1 segment or PCA hypoplasia can cause an increased risk of stroke like symptoms.

I hope this helps.

Thank you.

Answered byDr. Vivek Chail

Medically reviewed byiCliniq medical review team

Published At November 21, 2019
Reviewed AtNovember 26, 2025

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