Pheochromocytoma.
The cytoplasmic granules in an adrenal pheochromocytoma were predominantly ovoid with loose-fitting limiting membranes and eccentrically positioned dense cores. The occurrence of similar granules in a recurrent tumor involving the organ of Zuckerkandl in a second patient suggests that the latter tumor should be designated an extraadrenal pheochromocytoma.
Adrenal Gland Neoplasms↗