pseudostratified epithelium

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pseudostratified epithelium

[¦sü·dō′strad·ə‚fīd ‚ep·ə′thē·lē·əm]
(histology)
A type of epithelium in which all cells reach to the basement membrane but some extend toward the surface only part way, while others reach the surface.
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A histopathological examination of the parameatal cyst wall revealed an outer surface covered by ceratinized stratified squamous epithelium and an inner surface of the dermis lined by pseudostratified columnar and squamous epithelium No inflammatory and malignancy signs were present.
Exophytic papilloma shows delicate fibrovascular cores covered by epithelium that varies between three types: squamous; ciliated, pseudostratified columnar respiratory type epithelium; and transitional epithelium (figure 2).
The favoured aetiological theory, posited by Bruggeman in 1920, suggests an origin from the remnant of the embryonic nasolacrimal duct, and is is supported by the fact that both the nasolacrimal duct and nasolabial cysts are lined by the same pseudostratified columnar epithelium, and also by the fact that the cyst is located subjacent to the wing of the nose, in line with the naso-optic fissure.
In one large series of 64 cysts, 41% of cysts showed pseudostratified columnar epithelium only, and in, respectively, 14% or 23% stratified squamous epithelium or cuboidal epithelium was also present.
ABSTRACT Histologically, the epithelium of the digestive tract is pseudostratified columnar type, which is composed of 3 kinds of cells (i.
As this sheet of cells progressed through the dermis, its advancing edges recurved upon themselves and gave rise to an interior adjacent layer of pseudostratified columnar epithelium (Fig.
Microscopically, both the surface and the clefts were covered with a ciliated pseudostratified columnar epithelium (figure 4).
5: The central lumen is lined by pseudostratified columnar cells with muscle bundles seen deep to this layer.
Microscopic examination revealed pseudostratified columnar tumor cells with eosinophilic granular cytoplasm and round nuclei.
Histopathology of the specimen revealed a branchial fistula tract lined with pseudostratified columnar epithelium.
The ultrastructural features (presence of microvilli and secretory granules) further confirm the glandular differentiation and its resemblance to the "superficial indifferent cells" of the pseudostratified columnar epithelium or to the intermediate "transitional" epithelial cells lining the nasopharynx.