Colloid cyst

Location is a key feature of colloid cyst, more precisely called colloid cyst of the third ventricle (see Table... 

Its location in the third ventricle, usually near the choroid plexus and foramen of Monro, helps distinguish the colloid cyst from other cysts that superficially resemble it but that occur in different locations. This cyst s simple columnar and cuboidal epithelium, which... 

Colloid cyst Fibrous wall lined by inner ciliated and/or nonciliated simple columnar epithelium cyst contains colloid and cell ghosts Cytokeratin (-r) EMA Third ventricle... 

Ho KL, Garcia JH. Colloid cysts of the third ventricle Ultra-structural features are compatible with endodermal derivation. Acta Neuropathol. 1992 83 605-612. 

McKeever PE, Brissie NT. Scanning electron microscopy of neoplasms removed at strrgery surface topography and comparison of meningioma, colloid cyst, ependymoma, pitrritary adenoma, schwarmoma and astrocytoma. J Neuropathol Exp Neurol. 1977 36 875-896. 

McKeever PE, Hall BJ, Spicer SS. The origin of colloid cysts of the third ventricle. J Neuropathol Exp Neurol. 1978 37 658. 

Micro-, ultra-, and nano-filtration can separate smaller particles using media with defined porous sizes (i.e., 10 1—1 pm in microfiltration, 10 2—10 pm in ultrafiltration, and 10 3— 10 2 pm in nanofiltration). Residual colloidal and suspended solids can be removed by microfiltration. Selected salts, most organic compounds, bacteria, protozoan cysts, oocysts and viruses are removed by nanofiltration, so that the treated water will be disinfected. This advanced filtration is used for the treatment of effluents for indirect potable reuse applications such as groundwater injection, water softening, decoloriza-tion, or removal of micropollution. 

Sarcomatous and desmoplastic neoplasms and various cysts with collagenous walls may simulate abscesses (see Figs. 20.3 IB, 20.34A, and 20.39). These tumors may be distinguished by the lack of an inflammatory component and the presence of a neoplastic component. More problematic are cysts that have ruptured and exuded material foreign to the CNS, such as colloid or squamous epithelial cells. If this material is not detectable on TI E staining within the inflammatory reaction, immunohistochemical stains for cyst wall material, such as CK stains for epithelial cells, assist the interpretation. These other lesions are sterile in situ and do not stain for microorganisms as an abscess would (see Box 20.2). 

Membrane filtration is a highly effective barrier to particles such as suspended soHds, colloidal particles, cysts and bacteria producing treated water with very low turbidity (0.1 NTU) and consistent quality irrespective of the feed source. It has proven to be very effective and reliable in removing microbiological parasites, Giardia and Cryptosporidium, since these systems were first deployed in 1995. The application has increased dramatically due to its ability to produce high-quality potable water, small footprint and relatively low cost. These systems operate at very low feed pressures (<1—2 bar) and at relatively low trans-membrane pressure (TMP). 

The liver and spleen can be studied with Tc-labeled sulfur colloid. Space-occupying lesions such as cysts, abscesses, hematomas, or tumors can be detected in static images. For hepatobiliary evaluation derivatives of iminodiacetic acid labeled with... 

The samples were modified in direct (glow, diode) Ar plasma on Balzers SCD 050 device under the conditions presented in 2.3.1. Immediately after the plasma treatment the samples were inserted into water solution (2 wt. %) of 2-mercaptoethanol (ME), methanol solution (5.10 mol/dm ) of biphenyl-4,4 -dithiol (BPD) or into water solution (2 wt.%) of cysteamine (CYST) for 24 hours. To coat the polymers with the gold nanoobjects the plasma treated pol)rmers with grafted thiols were immersed for 24 hours into freshly prepared colloidal citrate stabilized solution of Au nanoparticles (AuNPs), [44,46] or Au nanorods (AuNR), 0.1 mol/dm water solution of cetyltrimethylammonium bromide). 

Microfiltration (MF), like ultrafiltration, is a pressure-driven membrane process. In the case of microfiltration, the pore size is typically in the 0.03- to O.l-pm range. In this range, individual bacteria and viruses will pass through the membrane. However, colloidal suspended sohds, floe particles, and parasite cysts are prevented from passing. No removal of dissolved solids is accomplished by microfiltration membranes. 

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