The main access route for middle cerebral artery (MCA) aneurysms is the transsylvian approach.
see Transsylvian approach to middle cerebral artery aneurysm.
see Superior Temporal Gyrus Approach to Middle Cerebral Artery Aneurysm.
see Pterional craniotomy.
In most cases of Middle cerebral artery aneurysm surgery the decision as to which surgical approach to use is made preoperatively depending on the presence of intraparenchymal clot, size of aneurysm, direction of aneurysm, and length of the proximal middle cerebral artery
Ogilvy et al., used the superior temporal gyrus when intraparenchymal hematoma was present in the temporal lobe or when the length of the middle cerebral artery trunk was long (average length 2.44 +/- 0.41 SE cm). This approach was used in 20 operations on 22 aneurysms. The sylvian fissure approach was used in cases where the middle cerebral artery main trunk was short (1.32 +/- 0.41 SE cm) or the direction of the aneurysm was favorable. 1).
There were no complications of temporal muscle atrophy, scar deformity, paresthesia, or pain around the scalp incision and frontalis palsy. This approach offers good surgical possibilities and little approach related morbidity in the clipping of incidental MCA aneurysms 2).