The exhibit displays enlarged adrenal with presence of solid tumor arising from the medulla. The tumor has red brown surface with areas of hemorrhage, necrosis and cystic degeneration.

Pheochromocytoma shows tumour cells arranged in nested (zellballen), trabecular and solid arrangement. The cells are large, polygonal, uniform and some showing extensively vacuolated, bundant fine, granular red-purple cytoplasm, salt and pepper chromatin.

Pheochromocytoma