Department of Hospital Pathology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
1Department of Pathology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
2Department of Pathology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
3Department of Pathology, Nara Hospital, Kindai University Faculty of Medicine, Nara, Japan
© 2017 The Korean Society of Pathologists/The Korean Society for Cytopathology
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Conflicts of Interest
No potential conflict of interest relevant to this article was reported.
Country | Criteria for non-diagnostic FNA | Incidence of non-diagnostic FNA |
---|---|---|
China | TBSRTC | 3.6% at one institution |
India | TBSRTC | 7.4% (0.5%-25.7%) from 38 studies |
Different criteria in a study: 10 clusters are needed with each having more than 20 cells; in case of presence of tissue fragments, minimum number of fragments required is 8. | ||
Royal College of Pathologists guidelines in one study | ||
Japan | General Rules for the Description of Thyroid Cancer system | 10% according to the Japanese system |
Japanese system | ||
Korea | TBSRTC | 12.4% (0%-32.6%) from 12 institutions |
Philippines | TBRSTC | 1.3% and 23.1% from 2 studies |
Taiwan | Variable but different from TBRSTCa | 8% at one institution |
Thailand | TBSRTC | 12.7%-47.6% from three institutions |
FNA, fine-needle aspiration; TBSRTC, the Bethesda System for Reporting Thyroid Cytopathology.
a Most Taiwan pathologists consider that the specimen is negative, but not non-diagnostic when there are less than six groups but more than 50 follicular cells in total or a degenerative hemorrhagic cyst with scant benign follicular cells.