영상의학적으로 뇌실내 종양처럼 보이는 뇌실내 동맥류: 증례 보고

Intraventricular aneurysm radiologically simulating ventricular tumor

Ventricular aneurysms are very rare. Most ventricular aneurysms are developed at the choroidal artery or a major branch of the circle of Willis. However, in the present study, we will introduce a special case of an intraventricular aneurysm that does not have the parent artery. Previously, a healthy 55 year-old man was admitted to our outpatient clinic with the complaints of headache of 3-month duration and gait disturbance of 2-month duration. On Brain computed tomography and magnetic resonance imaging, he had an intraventricular mass with a cyst. Furthermore, he did not have any aneurysm on magnetic resonance angiography. We used the endoscopic approach and the tumor was successfully removed. Pathological examination revealed that it was not a tumor, but an aneurysm. We experienced a special case that was suspected intraventricular tumor radiologically, but it was identified as an aneurysm. We found that ventricular system is a possible location of aneurysms which have no parent artery.