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A central nervous system tumor (CNS tumor) is an abnormal growth of cells from the tissues of the brain or spinal cord. [1] CNS tumor is a generic term encompassing over 120 distinct tumor types. [2]
For the concepts of benign and malignant neoplasia see Tumor and Cancer. For primary and secondary neoplasias see Metastasis. A brain tumor composed of benign cells, but located in a vital area (as the brain is), can be considered to be life-threatening — although the tumor and its cells would not be classified as malignant. [4]
This is an accepted version of this page This is the latest accepted revision, reviewed on 11 February 2025. Neoplasm in the brain Medical condition Brain tumor Other names Intracranial neoplasm, brain tumour, brain cancer Brain metastasis in the right cerebral hemisphere from lung cancer, shown on magnetic resonance imaging Specialty Neurosurgery, neuro-oncology Symptoms Vary depending on the ...
A nervous system neoplasm is a tumor that arises within the nervous system, either the central nervous system (CNS) or the peripheral nervous system (PNS). [ 1 ] [ 2 ] . Nervous system neoplasms include various types of brain and spinal cord tumors, such as gliomas , and meningiomas (of the CNS), and schwannomas (of the PNS) and can be either ...
Dysembryoplastic neuroepithelial tumour (DNT, DNET) is a type of brain tumor.Most commonly found in the temporal lobe, DNTs have been classified as benign tumours. [1] These are glioneuronal tumours comprising both glial and neuron cells and often have ties to focal cortical dysplasia.
Astrocytoma causes regional effects by compression, invasion, and destruction of brain parenchyma, arterial and venous hypoxia, competition for nutrients, release of metabolic end products (e.g., free radicals, altered electrolytes, neurotransmitters), and release and recruitment of cellular mediators (e.g., cytokines) that disrupt normal parenchymal function. [2]
Meningiomas arise from arachnoidal cap cells, [17] most of which are near the vicinity of the venous sinuses, and this is the site of greatest prevalence for meningioma formation. Some subtypes may arise from the pial cap cells that migrate during the development together with blood vessels into the brain parenchyma. [18]
Gemistocytes are also found in some chronic diseases and within certain brain tumors, which suggests the presence of a long-lasting pathological reaction. [7] Gemistocytic astrocytes can be observed in tissue damage, particularly Creutzefldt-Jakob disease and progressive multifocal leukoencephalopathy , which can be characterized by very large ...