A1 segment hypoplasia

Case contributed by Dr Heba Abdelmonem

Presentation

Investigated for recurrent syncope.

Patient Data

Age: 30 years
Gender: Female
MRI

MRA demonstrates hypoplasia of the A1 segment of the right ACA.

Case Discussion

Hypoplasia of the right A1 segment is compensated by dominance of the left A1 segment that supplies the right A2 segment, via the anterior communicating artery.

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