vascularization


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Related to vascularization: corneal vascularization

vascularization

 [vas″ku-lar-ĭ-za´shun]
2. the natural or surgically induced development of vessels in a tissue.

vas·cu·lar·i·za·tion

(vas'kyū-lăr'i-zā'shŭn),
The formation of new blood vessels in a part.
Synonym(s): arterialization (3)

vascularization

(văs′kyə-lər-ĭ-zā′shən)
n.
1. The process of vascularizing; the formation of vessels, especially blood vessels.
2. Medicine An abnormal or pathological formation of blood vessels.

vas·cu·lar·i·za·tion

(vas'kyū-lăr-ī-zā'shŭn)
The formation of new blood vessels in a part.

vascularization

The process of forming new blood vessels.

neovascularization

Development of new blood vessels, especially in tissues where circulation has been impaired by disease or trauma.
choroidal neovascularization (CNV) Abnormal growth of blood vessels, originating in the choriocapillaris, which pass through Bruch's membrane and then proliferate under the retinal pigment epithelium (type 1) and/or under the retina (type 2). It may occur as a result of a rupture of Bruch's membrane, release of cytokines (e.g. VEGF), inflammation, oxidative stress to the retinal pigment epithelium, or vascular insufficiency. The condition is the main cause of exudative (wet) age-related macular degeneration and it may be associated with various disorders including angioid streaks, choroidal rupture, pathological myopia, chorioretinal scars and birdshot retinochoroidopathy. See age-related macular degeneration.
corneal neovascularization See pannus.
iris neovascularization Abnormal formation of new blood vessels on the anterior surface of the iris. It is commonly associated with many conditions that have led to retinal ischaemia, such as diabetic retinopathy, occlusion of the central retinal vein, carotid arterial disease, uveal melanoma, long-standing retinal detachment, etc. The neovascularization begins at the pupil margin and often at the same time in the angle of the anterior chamber and spreads over the whole surface. New vessels are associated with fibrous tissue membranes, which may block the passage of aqueous humour through the trabecular meshwork (neovascular glaucoma) and ectropion uveae near the pupillary margin. Treatment typically includes photocoagulation to prevent the formation of new blood vessels.

pannus 

Abnormal superficial vascularization of the cornea covering the upper half, or sometimes the entire cornea. It is characterized by a thick plexus of vessels. It is found in some cases of contact lens wear, mainly soft lenses. Pannus following contact lens wear is referred to as corneal vascularization. If induced by soft lenses, it can be reduced by changing to lenses of high oxygen transmissibility or ceasing contact lens wear. Deep corneal vascularization involving the stroma is usually the result of a disease process (e.g. interstitial keratitis, phlyctenular keratitis, severe long-standing trichiasis, trachoma).
References in periodicals archive ?
Vascularization plays a very important role in skeletal development and repair [7].
(2006) reported the onset of corneal vascularization by the third day in animals with alkali-induced ulceration submitted to limbal transplantation.
The thyroid vascularization pattern (TVP) was classified into four categories, as previously planned [6]: pattern 0--the vascularization was decreased and was limited to the main peripheral arteries, which had reduced signals; pattern 1--the vascularization was limited to the main peripheral thyroid arteries, which exhibited the usual signals, whereas only signals of vascularization focal points with either a scattered distribution or a localized presence were found in the interiors of the nodules; pattern II--the vascularity clearly increased and had a scattered distribution; and pattern III--the vascularization was markedly increased and had a diffuse and homogeneous distribution, including the so-called "thyroid inferno" pattern.
In combination of contrast-specific ultrasound modalities, intra-articular vascularization and parenchymal perfusion can be demonstrated by separating contrast agent signals from tissue-derived signals.[sup][18] The second-generation agents which have been most commonly used are the following three ones: SonoVue [sup][R], Definity [sup][R]/Luminity [sup][R], and Sonazoid [sup][R].[sup][19] Some contrast-specific imaging techniques have been developed and applied in the CEUS imaging, the representatives of which are pulse inversion imaging and harmonic imaging.
Group 1 (evaluation at two months): Note the presence of mononuclear inflammatory infiltrate (yellow asterisks), vascularization and subtle particles from the graft (green circle); there is granulation tissue associated with medullary regions (red dots) and presence of new bone formation (HE, 250X).
Across the cornea OS, fibrotic, irregular, diffuse granulation tissue and dense superficial, and anterior stromal corneal vascularization were present, extending to the axial cornea.
The purpose of this study was to investigate whether VEGF can be loaded on nHAC/PLA composites to promote the axial vascularization of the scaffold in vivo.
Another problem encountered during graft is vascularization. A rapid reperfusion is a key to a successful graft.
The fluorangiography showed an improvement of retinal vascularization and a reduced endothelial permeability and leakage in the Pycnogenol, but not in the placebo-treated, patients.
assemble 28 chapters by neuroradiologists, radiologists, neurosurgeons, and neuropathologists from North America and Europe that detail imaging techniques for the spine that also address the paraspinal soft tissues, the normal anatomy of the spinal column and cord, age-related changes, degenerative disorders, normal vascularization, spinal ischemia and vascular malformations, trauma, tumors and cysts, metabolic disorders, inflammation and infection, preoperative mapping of pathology, intraoperative monitoring of physiology, vertebroplasty-kyphoplasty, and complications of surgery for decompressing spinal stenosis and disc disease.
All the results herein obtained using CAM assays in vascular net (percentage of vascularization, digital images, and histological analysis) allow to infer that S.
Mao and colleagues demonstrated that when human mesenchymal stem/progenitor cells were seeded in micropores of 3D calcium phosphate scaffolds, followed by infusion of gel-suspended CD34+ hematopoietic cells, greater vascularization was seen in mice than when mesenchymal cells were used alone.