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Lung parenchyma showing damage due to large subpleural bullae. Parenchyma (/ p ə ˈ r ɛ ŋ k ɪ m ə /) [1] [2] is the bulk of functional substance in an animal organ or structure such as a tumour. In zoology, it is the tissue that fills the interior of flatworms. In botany, it is some layers in the cross-section of the leaf. [3]
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]
Oligodendrogliomas are a type of glioma that are believed to originate from the oligodendrocytes of the brain or from a glial precursor cell. They occur primarily in adults (9.4% of all primary brain and central nervous system tumors) but are also found in children (4% of all primary brain tumors).
Viral encephalitis is inflammation of the brain parenchyma, called encephalitis, by a virus.The different forms of viral encephalitis are called viral encephalitides. It is the most common type of encephalitis and often occurs with viral meningitis.
Brain cells make up the functional tissue of the brain. The rest of the brain tissue is the structural stroma that includes connective tissue such as the meninges , blood vessels , and ducts. The two main types of cells in the brain are neurons , also known as nerve cells, and glial cells , also known as neuroglia. [ 1 ]
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Neurocysticercosis can be classified into two main types: parenchymal, which affects the brain tissue, and extraparenchymal, which occurs outside the brain tissue. [34] Parenchymal neurocysticercosis: neurocysticercosis lesions within brain parenchyma. [34] Viable parenchymal cysts: contains the scolex, typically between 0.5 and 2 cm in ...
Studies in 1985 indicated that cerebrospinal fluid and interstitial fluid may flow along specific anatomical pathways within the brain, with CSF moving into the brain along the outside of blood vessels; such 'paravascular channels' were possibly analogous to peripheral lymph vessels, facilitating the clearance of interstitial wastes from the brain.