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Marked atypia of type 2 pneumocytes is a characteristic finding in association with treatment with busulfan and other chemotherapeutic agents.. Atypia (from Greek, a + typos, without type; a condition of being irregular or nonstandard) [1] is a histopathologic term for a structural abnormality in a cell, i.e. it is used to describe atypical cells.
Individual cellular features of dysplasia are called epithelial atypia. [ 2 ] Examples of epithelial dysplasia include cervical intraepithelial neoplasia – a disorder commonly detected by an abnormal pap smear ) consisting of an increased population of immature (basal-like) cells which are restricted to the mucosal surface, and have not ...
Koilocytosis or koilocytic atypia or koilocytotic atypia are terms used in histology and cytology to describe the presence of koilocytes in a specimen. [1] Koilocytes may have the following cellular changes: Nuclear enlargement (two to three times normal size). Irregularity of the nuclear membrane contour, creating a wrinkled or raisinoid ...
Usually, moderate to severe cytologic atypia will require further excision to make sure that the surgical margin is completely clear of the lesion. [ citation needed ] The most important aspect of the biopsy report is that the pathologist indicates if the margin is clear (negative or free of melanocytic nevus), or if further tissue (a second ...
However, this case had almost moderate atypia with somewhat enlarged vesicular nuclei in the periphery, and therefore immunohistochemistry was performed that confirmed UDH: - Estrogen receptor showing heterogeneous positivity, rather than the diffusely positive expression seen in atypical ductal hyperplasia (ADH)
Usually, the atypical causes also involve atypical symptoms: No response to common antibiotics such as sulfonamide [5] and beta-lactams like penicillin.; No signs and symptoms of lobar consolidation, [6] [7] meaning that the infection is restricted to small areas, rather than involving a whole lobe.
If you test negative for COVID, can you be contagious? It depends. Here's what to know about COVID testing in 2024, and what your COVID test results may mean.
Atypical hyperplasia is a benign (noncancerous) cellular hyperplasia in which cells show some atypia. In this condition, cells look abnormal under a microscope and are increased in number. By organs