Summary
The authors report on two types of carotid-A1 junctional aneurysms projecting backwards. In the two A1-type examples, the aneurysm originated at the posterior wall of the proximal A1 joining the carotid termination and could be clipped using an ipsilateral pterional approach. However, in the carotid-type example, the aneurysm originated at the posterior wall of the carotid termination just below the A1 origin, and required a contralateral pterional approach to expose the aneurysm. Although the carotid-A1 junctional aneurysms are rare, their exact location and size can affect the side of the operative approach.
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Park, J., Baik, S. Posterior projecting carotid-A1 junctional aneurysms. Acta Neurochir (Wien) 149, 817–821 (2007). https://doi.org/10.1007/s00701-007-1223-0
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DOI: https://doi.org/10.1007/s00701-007-1223-0