Von Hippel-Lindau Syndrome: Diagnosis and Management of Hemangioblastoma and Pheochromocytoma

Figure 4

There is no tumor cell mitosis. There is no necrosis, no significant pleomorphism of the cells or their nuclei (including spindle-shaped cells, hyperchromasia of the nuclei, and large nucleoli), no tumor infiltration of the adrenal gland cortical tissues, no vascular or perineural invasion, and no invasion into the adrenal gland capsule (including the periadrenal tissues).