s Background Intracranial calcifications are veritable radiological pointer to pathologies. Therefore there is need to differentiate physiological and pathological calcifications. Objective Todetemine the incidence of physiological intracranial calcifications and relationship to age and sex. Materials And Methods A cross sectional descriptive study of the computed tomograms (CT) of the brain wa...

BACKGROUND AND PURPOSE Postoperative contrast-enhanced MR imaging of the brain is routinely used when evaluating for residual or recurrent brain tumor. It is imperative to be aware of morphologic changes and imaging features that typically occur in response to surgical manipulation at the postoperative site to avoid misinterpretation of imaging findings. Our purpose was to determine normal post...

purpose : choroidal melanoma is the most common primary ocular malignancy among the adult population. authors investigated the clinical findings, histopathologic features, types of retinal detachment and the precise anatomic origin of enucleated eyes for primary ocular malignant melanoma in shiraz university of medical sciences (sums) hospitals between 1990 and 2005. methods : this was a cross ...

Purpose The prevailing view is that the human retina is supplied by the central retinal artery (CRA), the short posterior ciliary arteries (SPCAs) support the choroid, and both the CRA and the SPCAs are so-called "end artery" systems. In this study, we investigate whether vascular connections among the retina, choroid, and the optic nerve head (ONH) exist, using selective cannulation and microp...

Visceral leishmaniasis is associated with chronic inflammatory stimulation, resulting in different clinical manifestations, ranging from unapparent infection to a systemic disease. In dogs, there are descriptions of neurological involvement with inflammatory infiltrates and specific antibodies in cerebrospinal fluid. To investigate the involvement of the choroid plexus and the blood-CSF barrier...

The choroid plexus, which is responsible for the maintenance of the biochemical milieu of the cerebrospinal fluid (CSF), avidly sequesters Pb. In order to test the hypothesis that chronic Pb exposure may impair choroid plexus function, male weanling Sprague-Dawley rats were exposed to Pb in drinking water at doses of 0, 50, or 250 micrograms Pb/ml (as Pb acetate) for 30, 60, or 90 days. The fun...

The choroid plexus epithelium is a cuboidal cell monolayer, which produces the majority of the cerebrospinal fluid. The concerted action of a variety of integral membrane proteins mediates the transepithelial movement of solutes and water across the epithelium. Secretion by the choroid plexus is characterized by an extremely high rate and by the unusual cellular polarization of well-known epith...

The relative levels of expression of Na,K-ATPase a and j3 subunit isoforms were determined in rat cerebral microvessels, choroid plexus, and capillary-depleted brain homogenates by Western blot analysis. Three a (al, a2, as) and two j3 vl, B2) subunits were detected in brain as previously reported. All 3 a and 2 j3 isoforms were also found in microvessels. The choroid plexus expressed al, fll, ...

The most common macular condition is called Age-related Macular Degeneration (AMD). It a neurodegenerative disease that leads to loss of central vision since the affected areas are main retina and choroid eye.

November/December 2013 SupplemeNt to retiNa toDay 1 The word “choroid” is derived from the Greek words for “forms” and “membrane.” The choroid is a highly vascular and pigmented tissue that lies between the retina and sclera and that has a histologic thickness between 0.10 mm (anterior) and 0.22 mm (posterior pole). The vascular supply of the outer retina is maintained by the choroid, and chang...