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Review Article
- Recent topics on thyroid cytopathology: reporting systems and ancillary studies
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Mitsuyoshi Hirokawa, Ayana Suzuki
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J Pathol Transl Med. 2025;59(4):214-224. Published online June 30, 2025
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DOI: https://doi.org/10.4132/jptm.2025.04.18
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Abstract
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- As fine-needle aspiration techniques and diagnostic methodologies for thyroid nodules have continued to evolve and reporting systems have been updated accordingly, we need to be up to date with the latest information to achieve accurate diagnoses. However, the diagnostic approaches and therapeutic strategies for thyroid nodules vary across laboratories and institutions. Several differences exist between Western and Eastern practices regarding thyroid fine-needle aspiration. This review describes the reporting systems for thyroid cytopathology and ancillary studies. Updated reporting systems enhance the accuracy, consistency, and clarity of cytology reporting, leading to improved patient outcomes and management strategies. Although a single global reporting system is optimal, reporting systems tailored to each country is acceptable. In such cases, compatibility must be ensured to facilitate data sharing. Ancillary methods include liquid-based cytology, immunocytochemistry, biochemical measurements, flow cytometry, molecular testing, and artificial intelligence, all of which improve diagnostic accuracy. These methods continue to evolve, and cytopathologists should actively adopt the latest methods and information to achieve more accurate diagnoses. We believe this review will be useful to practitioners of routine thyroid cytology.
Original Article
- The Bethesda System(TBS): A New Reporting System of Cervicovaginal Smear.
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Hy Sook Kim
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Korean J Cytopathol. 1995;6(2):85-98.
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Abstract
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- In 1989, the Bethesda System(TBS) was introduced as an attempt to standardize cervical/vaginal reporting systems.
TBS nomenclature was created for reporting cytologic diagnoses to replace the currently used Cervical Intraepithelial Neoplasia(CIN) and Papanicolaou Class System which are deemed less reproducible. The name for preinvasive squamous lesions was changed to squamous intraepithelial lesion(SIL), subdivided into low-grade and high-grade type.
TBS recommends a specific format for cytologic report, starting with explicit statement on the adequacy of the specimen, followed by general categorization and descriptive diagnosis. Pathologic and epidemiologic studies performed over last 10 years have provided evidence that human, papillomavirus(HPV) plays a significant role in the development of cervical neoplasia. TBS corresponds not only to currently held views of the behavior of preinvasive lesions and their HPV distribution, but also to the current guidelines for clinical management.
Editorial
- The Bethedsa System 2001 Workshop Report.
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Eun Kyung Hong, Jong Hee Nam, Moon Hyang Park
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Korean J Cytopathol. 2001;12(1):1-15.
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Abstract
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- The Bethesda System (TBS) was first developed in 1988 for the need to enhance the communication of the cytopathologic findings to the referring physician in unambiguous diagnostic terms. The terminology used in this reporting system should reflect current understanding of the pathogenesis of cervical/vaginal disease, so the framework of the reporting system should be flexible enough to accommodate advances in medicine, including virology, molecular biology, and pathology. Three years after the introduction of TBS, the second Bethesda workshop was held to set or amend diagnostic criteria for each categories of TBS. TBS 1991 is now widely used. The third Bethesda workshop, The Bethesda System 2001 Workshop, was held in National Cancer Institute, Bethesda, Maryland from April 30 to May 2, 2001. Again, the goals of this workshop were to promote effective communication and to clarify in reporting cervical cytopathology results to clinicians and to provide with the information to make appropriate decisions about diagnosis and treatment. Nine forum groups were made and there were Web-based bulletin board discussions between October, 2000 and the first week of April, 2001. On the basis of bulletin board comments and discussions, the forum moderators recommended revised terminologies in the Workshop. Hot discussions were followed after the presentation by forum moderators during the workshop.
Terminologies confusing clinicians and providing no additional informations regarding patient management were deleted in the workshop to clarify the cervicovaginal cytology results. Any informations related to the patient management were encouraged to add. So 'Satisfactory for evaluation but limited by' of 'Specimen Adequacy' catergory was deleted. Terminology of 'Unsatisfactory' was further specified as 'Specimen rejected' and 'Specimen processed and examined, but unsatisfactory'. Terminologies of 'Benign Cellular Change' and 'Within Normal Limits' were combined and terminology was changed to 'Negative for intraepithelial lesion
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