FENESTRATED OCULOMOTOR NERVE CAUSED BY INTERNAL CAROTID-POSTERIOR COMMUNICATING ARTERY ANEURYSM - CASE-REPORT

OBJECTIVE AND IMPORTANCE: The fenestrated oculomotor nerve associated with the internal carotid-posterior communicating artery aneurysm is v ery rare. CLINICAL PRESENTATION: A 48-year-old woman had a history of subarachnoid hemorrhage caused by a ruptured right middle cerebral art ery aneurysm, which was wrapped with good postoperative course. Twenty years later, the patient suffered frontal headache with a mild oculom otor nerve paresis in the right side. Follow-up neuroimaging studies d emonstrated a de novo right internal carotid-posterior communicating a rtery aneurysm. INTERVENTION: The aneurysm was exposed and clipped via a right pterional route. The fenestrated oculomotor nerve associated with the aneurysm was confirmed at surgery. CONCLUSION: We speculated that the fenestration was most likely caused by the growth of the aneu rysm.