Figure 3. Hemangioblastoma gross appearance and histology.
(Left) Intraoperative view of a hemangioblastoma of the cervical spinal cord. These tumors appear bright red or orange/yellow (due to high lipid content of stromal cells) in color and are invariably associated with large tortuous feeding arteries and arterialized draining veins. (Right) Corresponding histology (hematoxylin and eosin staining; original magnification 20 X) demonstrating the vacuolated (clear cell) hemangioblastoma stromal cells (arrows) surrounded by endothelial cells (arrowheads).