The intraventricular location is unique in that many of the tumor types are more commonly associated with extra-axial locations. Patients often present with obstructive hydrocephalus. Most intraventricular tumors are relatively benign and have well-defined margins. As they grow, the tumors expand the ventricle of origin. With malignant degeneration, extension into the brain parenchymal occurs. The primary blood supply to intraventricular lesions is derived from the choroidal arteries.


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