What percentage of adrenal tumors are pheochromocytoma?
What percentage of adrenal tumors are pheochromocytoma? Approximately 80 to 85% of chromaffin-cell tumors are pheochromocytomas, whereas 15 to 20% are paragangliomas. What percentage of pheochromocytomas are benign? Most pheochromocytomas/paragangliomas are benign. At least 10 percent of pheochromocytomas are malignant (as defined by the presence of metastases), while a larger proportion of paragangliomas (up to 25 percent) are malignant. What is the survival rate of pheochromocytoma? Patients with a small pheochromocytoma that has not spread to other parts of the body have a five-year survival rate of about 95%. Patients with pheochromocytoma that has grown back (recurred) or spread to...