نتایج جستجو برای: retinal metastasis
تعداد نتایج: 211575 فیلتر نتایج به سال:
Introduction Blue light is a part of the spectrum with the highest energy content, which can reach the retina. The damage that it can cause to the retina is called photochemical or blue-light retinal injury. For the retinal injury assessment of the photochemical and aphakic retinal hazards in the wavelength range of 300-700 nm, use of effective spectral radiance limits (W.m-2.sr-1) seems to be...
We report a case of branch retinal artery occlusion caused by an embolus of metastatic gastric adenocarcinoma. A 67-year-old man sought treatment for sudden visual loss in his left eye. He had a medical history of gastric cancer with liver metastasis. Findings on funduscopic examination included localized edema of the inner retina consistent with a supratemporal branch retinal artery occlusion ...
Pregnancy leads to significant changes in the body, which potentially affect the retina. Pregnancy can induce disease such as that seen in hypertensive retinopathy and choroidopathy. It can cause exudative retinal detachments in the HELLP syndrome (hemolysis, elevated liver enzymes, and low platelets), disseminated intravascular coagulation (DIC), and thrombotic thrombocytopenic purpura (TTP), ...
We provide an analysis of the dynamics of isometries and semicontractions of metric spaces. Certain subsets of the boundary at infinity play a fundamental role and are identified completely for the standard boundaries of CAT(0)– spaces, Gromov hyperbolic spaces, Hilbert geometries, certain pseudoconvex domains, and partially for Thurston’s boundary of Teichmüller spaces. We present several rath...
PURPOSE To investigate tumor thickness and location, the interval of time between treatment for choroidal melanoma (proton beam irradiation or enucleation) and diagnosis of metastatic disease, and rates and sites of metastasis. DESIGN Retrospective, interventional, noncomparative case series. METHODS Follow-up of 152 patients with primary choroidal melanoma, between 1992 and 2006 (14 years)...
Introduction: There are different methods to repair retinal detachment. In this trial the retinopexy in repairmen of retinal regmatogenesis RD is compared with other methods in Qazvin Teaching Hospitals during 1993-2003. Methods: This out come study was conducted on 47 patients with S/B and retinal break cryopexy (group I) , 30 patients undergoing S/B with barrier laser photocoagulation around...
Introduction: Alzheimer disease (AD) is the most common form of dementia worldwide. The modalities to diagnose AD are generally expensive and limited. Both the central nervous system (CNS) and the retina are derived from the cranial neural crest; therefore, changes in retinal layers may reflect changes in the CNS tissue. Optical coherence tomography (OCT) machine can show delicate retinal layer...
The mammary epithelium is thought to be stabilized by cell-cell adhesion mediated mainly by E-cadherin (E-cad). Here, we show that another cadherin, retinal cadherin (R-cad), is critical for maintenance of the epithelial phenotype. R-cad is expressed in nontransformed mammary epithelium but absent from tumorigenic cell lines. In vivo, R-cad was prominently expressed in the epithelium of both du...
retinoblastoma is the most common intraocular neoplasm in children. glial tumor of the retina and optic nerve head are considered to be congenital and are therefore classified as hamartomas. concurrent occurrence of these tumors in one eye is uncommon and by reviewing the studies, a few cases have been reported. we report a 9 years old boy with eye enucleation and concurrent occurrence of retin...
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