BACKGROUND
Paraganglioma develops from cells of the parasympathetic and sympathetic system. It usually manifests as a slow-growing and painless mass. Peragangliomas may be hereditary, benign or malignant, unilateral or bilateral tumors. They are well vascularized. In most cases, paraganglioma is located around the common carotid artery, but may also be located within the middle ear or in the ab...
