Intraventricular Tumor Dr. Konstantin Slavin MD University of Illinois, Chicago Associate Professor of Neurosurgery Video duration 2:05 minutes           ViewSite demonstration Dr. David Langer MD Albert Einstein College of Medicine Assistant Professor of Neurological Surgery Video duration 6:00 minutes           Vycor ViewSite Brain Access System being used to remove a 7cm Cystic Astrocytoma Size of incision 4.5 cm Size of craniotomy 3cm Size of corticotomy 2mm Note: • The excellent lighting and field of vision. • The absence of the need to use cottonoids to create channel opening. • When the device is advanced approximately 1 cm at a time how the brain tissue is retracted. • When the device is removed how the brain tissue returns to leave only a 2 mm corticotomy.