A neurocytoma and an associated lenticulostriate artery aneurysm presenting with intraventricular hemorrhage: Case report

Objective and importance: Hemorrhage associated with central neurocytoma ha s been described previously, but never in association with an aneurysm orig inating from a feeding artery. We present the first reported case of a cent ral neurocytoma in a patient with intraventricular hemorrhage caused by rup ture of an aneurysm on a lenticulostriate artery that supplied the tumor. Clinical presentation: A 35-year-old man who presented with an intraventric ular hemorrhage underwent magnetic resonance imaging and cerebral angiograp hy that disclosed a right lateral intraventricular mass and a 7-mm fusiform aneurysm from a lateral lenticulostriate branch of the right middle cerebr al artery. Intervention: The patient underwent a contralateral transcallosal explorati on and resection of the tumor, with excision of the adjacent lenticulostria te artery aneurysm. Pathological review demonstrated that the tumor was a n eurocytoma. The aneurysm was discrete from the tumor but occurred on a vess el that supplied the tumor. Conclusion: Previous reports have demonstrated that intraventricular neuroc ytoma may present with tumor hemorrhage. In this case, an aneurysm separate and distinct from the tumor was the bleeding culprit, and the aneurysm was on an artery that fed into the tumor. Any such aneurysm must be identified and treated appropriately for therapy to be complete.