These tumors most commonly are located in the trigone of the lateral ventricle but may be found in the third or rarely the fourth ventricle. There is no diagnostic syndrome for the lateral ventricle meningioma. The symptoms are often vague, with headache, mental change, and visual complaints the most frequent.
MRI clearly defines the extent of the tumor. In patients with medium-size tumors, angiography is probably not needed because the blood supply from the choroidal arteries can be found after internal decompression of the tumor. However, when the tumor is large, the study may provide useful information about the location of the feeding arteries.
The posterior parieto-occipital incision for better overall access to the tumor, particularly in the dominant hemisphere, is preferred by some. Others have used a middle temporal gyrus approach. This has the advantage of allowing early occlusion of the anterior choroidal artery branches. A combined approach also in use.
Total removal of the tumor can be achieved in all cases. 60% has good result, 20% fair, and 20%e with poor. Konovalov et al. reported one death among 18 patients treated between 1980 and 1989.