NCIt definition : A paraganglioma arising from the chromaffin cells of the paraganglia that are located
along the sympathetic nerves. It includes extra-adrenal paragangliomas and paragangliomas
that arise from the adrenal medulla. The latter are commonly referred to as pheochromocytomas.
Representative examples of extra-adrenal sympathetic paragangliomas include the bladder,
and superior and inferior paraaortic paragangliomas. Clinical signs are related to
the secretion of catecholamines resulting in hypertension.;