Synonyms for perivascular or Related words with perivascular
Examples of "perivascular"
spaces are categorized into three types:
epithelioid cell tumour, also known as PEComa or PEC tumour, is a family of mesenchymal tumours consisting of
epithelioid cells (PECs). These are rare tumours that can occur in any part of the human body.
spindle-shaped, arranged in
mantles and diffuse masses; some cells contain
cell is in the periphery of the vasculature, and may refer to:
microglia, juxtavascular microglia can be distinguished mainly by their location. Juxtavascular microglia are found making direct contact with the basal lamina wall of blood vessels but are not found within the walls. Like
cells, they express MHC class II proteins even at low levels of inflammatory cytokine activity. Unlike
cells, but similar to resident microglia, juxtavascular microglia do not exhibit rapid turnover or replacement with myeloid precursor cells on a regular basis.
Postmortem studies combined with MRI suggest that hyperintensities are dilated
spaces, or demyelination caused by reduced local blood flow.
Myopericytoma, also glomangiopericytoma, is a rare
soft tissue tumour. It is usually benign and typically in the distal extremities.
Limited data from post mortems and nerve biopsy samples are consistent with a
lymphocytic infiltration, i.e. an inflammatory aetiology.
PECs consist of
epithelioid cells with a clear/granular cytoplasm and central round nucleus without prominent nucleoli.
spaces are distinguished on an MRI by several key features. The spaces appear as distinct round or oval entities with a signal intensity visually equivalent to that of cerebrospinal fluid in the subarachnoid space. In addition, a
space has no mass effect and is located along the blood vessel around which it forms.
spaces are so closely correlated with cerebrovascular disease, there is much current research on their use as a diagnostic tool. In a recent study of 31 subjects, abnormal dilation, along with irregular CSF pulsation, were correlated with those subjects having three or more risk factors for strokes. Therefore,
spaces are a possible novel biomarker for hemorrhagic strokes.
spaces are common among the elderly and uncommon in children. Studies have noted the association between both developmental delay and non-syndromic autism and enlarged or dilated
spaces. Non-syndromic autism categorizes autistic patients for which there is no known cause.
In addition to osteoblasts, HSCs interact with many mesenchymal cells as they make their way to the sinusoids in the
niche. Removal of nestin-expressing MSCs has shown a significant decrease in LT-HSCs. These cells secrete high levels of CXCL12 and closely associate with sympathetic nerves that influence cytokine-induced migration of HSCs. Similar to these cells, CAR cells have correlated with reduced HSCs and LT-HSC activity when ablated. One difference between these cell types, despite the similarity in function, is that CAR cells may be found in both endosteal and
niches, while nestin-positive MSCs are found exclusively in the
Papular eruption of blacks is a cutaneous condition characterized clinically by small, pruritic papules and histologically by a mononuclear cell-eosinophil
Similar to the research concerning a potential connection between
spaces and Alzheimer's, MRI scans of people recently diagnosed with multiple sclerosis (MS) have been studied. Larger, more prevalent spaces have been observed in those with MS. Additional studies with similar findings have suggested that the inflammatory cells which contribute to the demyelination that characterizes MS also attack the
spaces. Studies using advanced MRI techniques will be necessary to determine if the
spaces can be implicated as a potential marker of the disease.
Hypoplasia of the corpus callosum, enlarged lateral ventricles, and Virchow-Robin
spaces have all been reported in people with proximal 18q-.
Pulmonary interstitial emphysema is created when air bursts or ruptures through tissue from the alveoli and bronchioles into the
tissue of the lung.
These multifocal lesions are observed in tuberous sclerosis, and can be associated with lymphangioleiomyomatosis and
epithelioid cell tumour (PEComa or clear cell "sugar tumor")).
Unlike the other types of microglia mentioned above, "
" microglia refers to the location of the cell rather than its form/function.
microglia are mainly found encased within the walls of the basal lamina. They perform normal microglial functions, but unlike normal microglia they are replaced by bone marrow derived precursor cells on a regular basis and express MHC class II antigens regardless of the outside environment.
microglia also react strongly to macrophage differentiation antigens. These microglia have been shown to be essential to repair of vascular walls, as shown by Ritter's experiments and observations on ischemic retinopathy.
microglia promote endothelial cell proliferation allowing new vessels to be formed and damaged vessels to be repaired. During repair and development, myeloid recruitment and differentiation into microglial cells is highly accelerated to accomplish these tasks.
A biopsy of the lesions only shows superficial and mid-dermal
infiltrates and occasionally eosinophils. This method is so nonspecific as to be inconclusive in diagnosis.
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