Here, there are
pseudostratified columnar cells admixed with large mucus cells and cells with homogenous eosinophilic cytoplasm.
The classic histopathology findings included the following: (1) a skin tag: stratified squamous epithelium with occasionally striated muscles or cartilage; (2) a main lesion: stratified squamous epithelium with surface parakeratosis and absence of dermal adnexal structures, with mild inflammatory infiltrate of lymphocytes, plasma cells, and neutrophils possibly present; and (3) a sinus tract: squamous or
pseudostratified columnar epithelium.
All of them presented a
pseudostratified columnar ciliated respiratory epithelium and some showed other features of the normal bronchopulmonary tree such as cartilage and glands.
Haematoxylin and eosin stained histopathologic section of nasal growths revealed myxomatous stroma filled with inflammatory cells and lined by regular respiratory epithelium (
pseudostratified columnar epithelium).
Histopathologically it is lined by
pseudostratified columnar epithelium (one to four cell layers thick) mimicking the transitional epithelium of the urethra.
For oesophagus, the tunica mucosa consisted of ciliated
pseudostratified columnar epithelium with numerous Goblet cells especially at the first to the third segments (Figure 1(a)).
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.
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.
The larval surface region consists of a
pseudostratified columnar epithelium of elongate flagellated cells; however, a basal lamina is absent [ILLUSTRATION FOR FIGURE 1 OMITTED].
However, in the middle and distal regions, the epithelium varied from simple columnar to
pseudostratified columnar. The apical cytoplasm of the epithelial cells was thrown into by a continuous striated border of microvilli (Fig.
The maxillary cysts lined by
pseudostratified columnar epithelium (respiratory epithelium) can show different pathologic conditions and hinder the diagnosis, thus challenging the clinician and pathologist.
The histology revealed muscle bundles and cystically dilated endometrial glands lined by
pseudostratified columnar epithelium with extensive area of haemorrhage Figure 1 and 2.
