Abstract
Background and Study Aims To explore the usefulness of a unilateral approach for clipping multiple aneurysms
including a contralateral paraclinoid aneurysm.
Materials and Methods Between January 2011 and May 2016, the unilateral approach was used to clip a contralateral
paraclinoid aneurysm plus additional ipsilateral aneurysms. The records of these patients
were analyzed retrospectively.
Results A total of 27 bilateral aneurysms in 12 patients were clipped successfully via a
unilateral pterional craniotomy. All patients showed a good recovery (Glasgow Outcome
Scale score: 5). Postoperative digital subtraction angiography or computed tomography
angiography did not show any residual aneurysm. Of the three patients with preoperative
visual symptoms, two showed improvement. No visual function impairment was observed
among the others.
Conclusion The contralateral approach remains a safe and reliable treatment option for selected
paraclinoid aneurysms and allows to clip additional ipsilateral aneurysm(s). Feasibility
depends on the type of paraclinoid aneurysm and other specific related features. It
is an alternative approach for experienced neurosurgeons.
Keywords
paraclinoid aneurysms - contralateral approach - clipping - classification