Anterior cerebral arterial variations

Case contributed by Paresh K Desai
Diagnosis almost certain


Underwent MRI for visual problems. MRI did not reveal parenchymal abnormalities.

Patient Data

Age: 55 years
Gender: Male

Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.

 MRI angiography reveals:

  • duplicated/fenestrated A1 segment on the right side.
  • common A2 trunk which divides into two A3 segments.
    • this is different from Azygous ACA - as there is no common trunk for the entire tree (according to Lasjunias-Bernstein classification)
  • no ACom

Case Discussion

This case shows two recognized arterial variations of the anterior cerebral artery, fenestrated A1 segment and common trunk of A2 segment, incidentally detected on MR angiography.

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