<unk>  is a rare and benign tumor of the autonomic nerve fibers arising from neural crest sympathogonia, which are completely undifferentiated cells of the sympathetic nervous system. However,<unk> s themselves are fully differentiated neuronal tumors that do not contain immature elements.<unk> s most frequently occur in the abdomen, however these tumors can grow anywhere sympathetic nervous tissue is found. Other common locations include the adrenal gland, paraspinal retroperitoneum, posterior mediastinum, head, and neck. It is contained within the neuroblastic tumors group, which includes:<unk>  (benign), Ganglioneuroblastoma (intermediate), Neuroblastoma (aggressive).
Ganglioneuroma
Ganglion cyst
Schwannomatosis
Neurofibroma
Glomus tumor
Neuroma
Brenner tumour
Choroid plexus carcinoma