stratified squamous epithelium


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strat·i·fied squa·mous ep·i·the·li·um

epithelium consisting of several layers of keratin-containing cells in which the surface cells are flattened and scalelike and the deeper cells are polyhedral. Keratin filaments become progressively more abundant toward the surface, which on the dry areas of the body may consist of a layer of dead corneocytes.
References in periodicals archive ?
The handpiece emits a safe blue light into the oral cavity that penetrates the stratified squamous epithelium, inducing fluorescence in normal cells.
3) Histologic examinations have shown that congenital lacrimal fistulae are lined with stratified squamous epithelium that is similar to that of normal canaliculi.
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.
Microscopic examination showed a dilated cystic cavity lined with stratified squamous epithelium arising from the skin surface.
The epithelial lining of branchial cleft cysts varies, ranging from a combination of stratified squamous epithelium and columnar ductal epithelium to a pattern of columnar ciliated epithelium with goblet cells and no squamous epithelium.
In just 2 foci, the malignant neoplasm connected to the epidermal surface via a funnel-shaped opening, and the epithelium in those regions displayed a gradual transition of stratified squamous epithelium at the surface to glandular epithelium within the cystic space.
Most of these (75%) are cysts characterized by a uniform, smooth, unilocular space lined by stratified squamous epithelium (90%), respiratory epithelium (8%), or a combination and are typically surrounded by a variable amount of lymphoid stroma.
Histopathologic diagnostic criteria of SAN include (1) location in dermis and subcutis of nipple or areola; (2) irregular, compressed, or comma-shaped tubules infiltrating into smooth muscle bundles and/or nerves; (3) presence of myoepithelial cells around the tubules; (4) presence of cysts lined by stratified squamous epithelium and filled with keratinous material; and (5) absence of mitotic activity and necrosis.
Histopathologic examination of the mass revealed a fibrocollagenous wall that was lined with stratified squamous epithelium.
Histologically, dentigerous cysts typically feature a thin connective-tissue wall that is lined by a thin layer of stratified squamous epithelium within the lumen.
The cyst was lined by keratinizing stratified squamous epithelium with a granular layer (Figure 3).