A1 segment hypoplasia
Presentation
Investigated for recurrent syncope.
Patient Data
Age: 30 years
Gender: Female
From the case:
A1 segment hypoplasia
MRI
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MRA MRA
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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