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.
