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- W2496993110 abstract "Recently, Faquin et al.1 brought to your readers' attention the presence of atypical cells in aspirates of cystic lesions of the thyroid gland. We believe these cells can be diagnosed more specifically as squamous metaplastic cells, as we have reported.2 Pathologists are familiar with the appearance of squamous metaplastic cells in cervicovaginal smears stained by the Papanicolaou method. However, many pathologists are not acquainted with squamous metaplastic cells in smears from thyroid aspirates. Because of the large size of these cells (compared with normal follicular cells), the variation in nuclear size and shape, and the visible nucleoli, they may be misinterpreted as malignant. Pathologists should be aware of this common alteration (16% of our thyroidal aspirates show some degree of it) to avoid misinterpreting these cells as atypical or malignant. Why are squamous metaplastic cells detected more easily in cytologic smears than in tissue sections? We offered an analogy with an onion and illustrated it.2 The tissue section is comparable to a cross section of an onion in which the layers or rings are evident but not the delicate membranes that separate these layers. If a part of this membrane is detached and spread flat on a surface, then it is easier to identify than in the cross section. This is comparable to the sheets of squamous metaplastic cells seen in the smears from thyroidal aspirates. We would like to remind the reader of mesothelial cells. The sheets of mesothelial cells are seen easily in smears from pleural effusions or from ascitic fluid. In tissue sections, the thin layer of pleura or the thin peritoneal lining is difficult to identify. We reiterate our conclusions from that publication: 1) Squamous metaplastic cells are a frequent finding in smears from fine-needle aspirations of cystic lesions of the thyroid. 2) Squamous metaplastic cells can be identified more easily in cytologic smears than in tissue sections. 3) Squamous metaplastic cells may be diagnosed erroneously as “atypical” or “malignant” by the inexperienced cytopathologist." @default.
- W2496993110 created "2016-08-23" @default.
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- W2496993110 date "2006-01-06" @default.
- W2496993110 modified "2023-10-18" @default.
- W2496993110 title "“Atypical” cells in fine-needle aspiration biopsy specimens of benign thyroid cysts" @default.
- W2496993110 cites W2059797567 @default.
- W2496993110 doi "https://doi.org/10.1002/cncr.21709" @default.
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