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Outcome of Subclassification of Indeterminate (Thy-3) Thyroid Cytology into Thy-3a and Thy-3f
Author(s) -
Catherine Brophy,
Rania Mehanna,
Julie McCarthy,
Antoinette Tuthill,
Matthew S. Murphy,
Patrick Sheahan
Publication year - 2015
Publication title -
european thyroid journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.23
H-Index - 10
eISSN - 2235-0802
pISSN - 2235-0640
DOI - 10.1159/000441221
Subject(s) - medicine , malignancy , cytology , indeterminate , atypia , thyroid nodules , incidence (geometry) , thyroid , pathology , retrospective cohort study , nodule (geology) , radiology , gastroenterology , physics , mathematics , pure mathematics , optics , paleontology , biology
The British Thy system is a widely used classification system for reporting thyroid fine-needle aspiration (FNA) cytology. The Royal College of Pathologists in 2009 recommended the subdivision of the Thy-3 (indeterminate) category into Thy-3a (atypia) and Thy-3f (follicular neoplasm). Our objective was to examine the malignancy rates of Thy-3a and Thy-3f cases at our institution and to investigate whether the risk of malignancy in Thy-3a cases is reduced by FNA on a different occasion showing benign cytology.

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