Abstract
In three cases of tumor near the transparent septum, we performed surgery using the transcallosal approach.
In consideration of previous reports on the procedure involving the problem of hemorrhagic infarction owing to a damaged parasagittal vein, we evaluated the lesion by means of MRI sagittal section and venous phase of cerebral angiography to select the venous entry zone and operative side. With these preparations, it was possible to resect the tumors in a suffciently wide visual field, while preserving the parasagittal vein during surgery in all three cases. However, it must be noted that there is the possibility of causing subendymal damage in cases of an extra large tumor extending to the body of lateral ventricle, particularly when the tumor is attached to the outside of the body of lateral ventricle.
