Help docs! i'm trying to find out what causes von hippel lindau disease?

See doctor: Von hippel lindau disease involve s genetic mutation of VHL gene , involves multiple organs as tumors of brain kidneys eyes and glands affecting blood vessels ---called hemangiomas .One may get headache,problem in balancing ,walking ,dizziness and blindness depending upon the size of hemangioma .Better discuss with your doctor if you have any symptoms .