what is flat epithelial atypia?
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Flat epithelial atypia (FEA) is a benign proliferative breast lesion characterized by columnar cell changes with cytologic atypia. It is often referred to as an “atypical” lesion or a high-risk lesion.
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A stratified epithelium consists of multiple layers of cells in which only the basal layer is attached to the basement membrane. A simple epithelium which appears to be stratified is classified as "pseudostratified" (the nuclei are in different layers, but all the cells are in contact with basement membrane).
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Pseudostratified columnar epithelium is a type of epithelium that appears to be stratified but instead consists of a single layer of irregularly shaped and differently sized columnar cells. In pseudostratified epithelium, nuclei of neighboring cells appear at different levels rather than clustered in the basal end.
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In a simple epithelium the cells form a single layer and are all attached to the basement membrane. A stratified epithelium consists of multiple layers of cells in which only the basal layer is attached to the basement membrane.
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Simple cuboidal epithelium consists of a single layer cells that are as tall as they are wide. The important functions of the simple cuboidal epithelium are secretion and absorption. This epithelial type is found in the small collecting ducts of the kidneys, pancreas, and salivary glands.
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Most mucous membranes contain stratified squamous or simple columnar epithelial tissue. The epithelial tissue sheet lies directly over the layer of loose connective tissue called lamina propria. In some mucosa, the lamina propria rests on a deeper, third layer of smooth muscle.
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This type of epithelium is often permeable and occurs where small molecules need to pass quickly through membranes via filtration or diffusion. Simple squamous epithelia are found in capillaries, alveoli, glomeruli, and other tissues where rapid diffusion is required. Cells are flat with flattened and oblong nuclei.
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Squamous epithelial cells are generally round, flat, and have a small, centrally located nucleus. The cell outline is slightly irregular, and cells fit together to form a covering or lining.
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All warts are caused by human papillomavirus (HPV), which has more than 100 different types. Flat warts are caused by HPV types 3, 10, 28, and 49. These strains are benign, unlike genital HPV, which can lead to cervical cancer in women.
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Simple epithelial tissue is organized as a single layer of cells and stratified epithelial tissue is formed by several layers of cells.
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Simple hyperplasia: The endometrium contains an increased number of dilatated glands. Complex hyperplasia without atypia: The glands appear crowded and are surrounded by relatively scant stroma. The glandular epithelium are lined by uniform cells, which show no nuclear atypia.
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If there are squamous epithelial cells in your urine, it may mean your sample was contaminated. This means that the sample contains cells from the urethra (in men) or the vaginal opening (in women). It can happen if you do not clean well enough when using the clean catch method.
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Flat warts are smooth, flat-topped, flesh- or brownish-yellow-colored bumps the size of a pinhead. They're commonly found on the face, back of the hands, or legs, and tend to appear in large numbers. Flat warts are also called juvenile warts because they're most commonly found in children and young adults.
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The Bethesda system classifies atypical glandular cells of undetermined significance (AGUS) as glandular cells that demonstrate nuclear atypia appearing to exceed reactive or reparative changes but lacking unequivocal features of adenocarcinoma. AGUS occurs in approximately 0.18 to 0.74 percent of all cervical smears.
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Epidermoid and pilar cysts are smooth round lumps which you can see and feel just beneath the skin surface. They are very common. Often they are small, like a pea, but sometimes they slowly get bigger over many months to become a few centimetres in diameter.
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Simple squamous epithelia are found in capillaries, alveoli, glomeruli, and other tissues where rapid diffusion is required. Cells are flat with flattened and oblong nuclei. ... This epithelium is associated with filtration and diffusion. This tissue is extremely thin, and forms a delicate lining.
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Simple squamous epithelia are found in capillaries, alveoli, glomeruli, and other tissues where rapid diffusion is required. Cells are flat with flattened and oblong nuclei. It is also called pavement epithelium due to its tile-like appearance. ... This tissue is extremely thin, and forms a delicate lining.