Figure 3
From: Adrenal cortical tumors, pheochromocytomas and paragangliomas
Pheochromocytoma. (a) The tumor cells have abundant basophilic cytoplasm. A prominent cell-nesting pattern (Zellballen) is noted. (b) Ultrastructural features of a pheochromocytoma with abundant secretory granules. The nonepinephrine-containing granules have a halo between the dense core and the granule membrane.
