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The lateral aortic lymph nodes, typically 15 to 20 on each side, are the ones usually chosen for dissection or biopsy in the treatment or diagnosis of cancer.. A dissection usually includes the region from the bifurcation of the aorta to the superior mesenteric artery or the renal veins.
Other common locations include the adrenal gland, paraspinal retroperitoneum, posterior mediastinum, head, and neck. [1] It is contained within the neuroblastic tumors group, which includes: [ 3 ] Ganglioneuroma (benign), Ganglioneuroblastoma (intermediate), Neuroblastoma (aggressive).
Spinal tumors are neoplasms located in either the vertebral column or the spinal cord. [1] There are three main types of spinal tumors classified based on their location: extradural and intradural (intradural-intramedullary and intradural-extramedullary).
MRI of a patient with anaplastic astrocytoma. The WHO classification of tumours of the central nervous system is a World Health Organization Blue Book that defines, describes and classifies tumours of the central nervous system (CNS).
It is this ability to move superiorly and inferiorly along the chain that results in the mass response to the sympathetic nervous system. A preganglionic fibre may synapse to 15–20 postganglionic fibres. The postganglionic neurons extend across most of the body. [4]
A nerve sheath tumor is a type of tumor of the nervous system (nervous system neoplasm) which is made up primarily of the myelin surrounding nerves.Nerve sheath tumors can be benign or malignant, and may affect both the peripheral and central nervous systems.
A neuroma (/ nj ʊəˈr oʊ m ə /; plural: neuromata or neuromas) is a growth or tumor of nerve tissue. [1] Neuromas tend to be benign (i.e. not cancerous); many nerve tumors, including those that are commonly malignant, are nowadays referred to by other terms.
Most paragangliomas are asymptomatic, present as a painless mass, or create symptoms such as hypertension, tachycardia, headache, and palpitations. [3] While all contain neurosecretory granules, only in 1–3% of cases is secretion of hormones such as catecholamines abundant enough to be clinically significant; in that case manifestations often resemble those of pheochromocytomas (intra ...