Classification<unk> s originate from paraganglia in chromaffin-negative glomus cells derived from the embryonic neural crest, functioning as part of the sympathetic nervous system (a branch of the autonomic nervous system). These cells normally act as special chemoreceptors located along blood vessels, particularly in the carotid bodies (at the bifurcation of the common carotid artery in the neck) and in aortic bodies (near the aortic arch). Accordingly,<unk> s are categorised as originating from a neural cell line in the World Health Organization classification of neuroendocrine tumors. In the categorization proposed by Wick,<unk> s belong to group II. Given the fact that they originate from cells of the orthosympathetic system,<unk> s are closely related to pheochromocytomas, which however are chromaffin-positive.
Paraganglioma
Ganglioglioma
Neurothekeoma
Schwannoma
Glomus tumor
Central neurocytoma
Astrocytoma
Pilocytic astrocytoma