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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]
While these are the causative processes for most cases, a number of other pathological processes are known to accelerate or worsen them, including coagulopathy, vasculitis, brain tumors, ischemic stroke, vascular malformations, and others. In general, diseases and risk factors known to damage blood vessels are considered risk factors, but ...
Intracerebral hemorrhage (ICH), also known as hemorrhagic stroke, is a sudden bleeding into the tissues of the brain (i.e. the parenchyma), into its ventricles, or into both. [ 3 ] [ 4 ] [ 1 ] An ICH is a type of bleeding within the skull and one kind of stroke (ischemic stroke being the other).
Neurocysticercosis can be classified into two main types: parenchymal, which affects the brain tissue, and extraparenchymal, which occurs outside the brain tissue. [37] Parenchymal neurocysticercosis: neurocysticercosis lesions within brain parenchyma. [37] Viable parenchymal cysts: contains the scolex, typically between 0.5 and 2 cm in ...
Those with parenchymal contusion would require frequent follow-up imaging because such contusions may grow large enough to become hemorrhage and exerts significant mass effect on the brain. [3] Cerebral microhemorrhages is a smaller form of hemorrhagic parenchymal contusion and are typically found in white matter. Such microhemorrhages are ...
Another late form of neurosyphilis is general paresis, which is a slow degenerative process of the brain. Neuropsychiatric symptoms might appear due to overall damage to the brain. These symptoms can make the diagnosis more difficult and can include symptoms of dementia, [11] [12] mania, psychosis, depression, [13] and delirium. [14]
Cerebritis is the inflammation of the cerebrum, which performs a number of important functions, such as memory and speech.It is also defined as a purulent nonencapsulated parenchymal infection of the brain which is characterized by nonspecific features on CT scans (ill-defined low density area with peripheral enhancement) and cannot reliably be distinguished from neoplasms.
The term neurocysticercosis is generally accepted to refer to cysts in the parenchyma of the brain. It presents with seizures and, less commonly, headaches. [12] Cysticerca in brain parenchyma are usually 5–20 mm in diameter. In subarachnoid space and fissures, lesions may be as large as 6 cm in diameter and lobulated.