Fig. 1
In Patient 2, a right lateral ventricular tumor was incidentally detected. a Preoperative magnetic resonance imaging (MRI) with gadolinium contrast showing a tumor in the right lateral ventricle (maximum diameter: 5.9 cm, tumor volume: 38.3 cm3). b Preoperative digital subtraction angiography (antero-posterior projection) reveals feeders originating solely from the anterior choroidal artery. The diameter of the AChA was 1.8 mm. c For endovascular treatment, a microcatheter is advanced beyond the angiographic plexal point (arrowhead). After a provocative test was performed using lidocaine and a barbiturate agent, the feeding arteries were obstructed using 100–300 µm trisacryl gelatin microspheres and coils. d Digital subtraction angiography (antero-posterior projection) reveals that the feeders projecting from the anterior choroidal artery have diminished after endovascular treatment. e After endovascular treatment, MRI shows a 97.9 % decrease of gadolinium-enhanced lesions. f After tumor removal via an intraparietal sulcus approach, MRI shows no residual tumor