Malignancy Risk and Related Factors of Atypia of Undetermined Significance/Follicular Lesion of Undetermined Significance in Thyroid Fine Needle Aspiration
Atypia of undetermined significance/follicular lesion of undetermined significance (AUS/FLUS) in thyroid fine needle aspiration (FNA) is a challenging category. The malignancy risk is different by multiple factors and subsequent management strategy is inconclusive. Therefore, we analyzed the maligna...
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2018-01-01
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| Series: | International Journal of Endocrinology |
| Online Access: | http://dx.doi.org/10.1155/2018/4521984 |
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| author | So-hyeon Hong Hyejin Lee Min-Sun Cho Jee Eun Lee Yeon-Ah Sung Young Sun Hong |
| author_facet | So-hyeon Hong Hyejin Lee Min-Sun Cho Jee Eun Lee Yeon-Ah Sung Young Sun Hong |
| author_sort | So-hyeon Hong |
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| description | Atypia of undetermined significance/follicular lesion of undetermined significance (AUS/FLUS) in thyroid fine needle aspiration (FNA) is a challenging category. The malignancy risk is different by multiple factors and subsequent management strategy is inconclusive. Therefore, we analyzed the malignancy risk of AUS/FLUS according to radiological and clinical features. A total of 687 nodules that had been initially diagnosed as AUS/FLUS were retrospectively reviewed from 6365 thyroid FNAs between 2011 and 2014. The ultrasonographic (US) features were categorized using the Korean Thyroid Imaging Reporting and Data System. Radiological and clinical features were compared according to the second FNA results or histologically confirmed results from surgery. Repeat FNA was performed on 248 (36%) nodules, and 49 (7%) nodules underwent immediate surgery. Among the 248 nodules subjected to repeated FNA, 49 (20%) nodules were diagnosed again as AUS/FLUS, 123 (50%) were found to be benign, and 47 (19%) were diagnosed as follicular neoplasm, suspicious for malignancy or malignant. Among histologically confirmed nodules, the US features were more unfavorable in malignant nodules, and hypo- or anechogenicity was associated with a higher risk of malignancy after adjusting for age, size, and other US features (P<0.01). In conclusion, we observed that malignant nodules tended to show unfavorable US features, especially hypo- or anechogenicity. Age, sex, and thyroid function were not significantly associated with malignancy risk. We also found out that malignancy risk was not different between the group which underwent immediate operation following the AUS/FLUS diagnosis and the group which underwent repeated FNA after the initial diagnosis. |
| format | Article |
| id | doaj-art-49dfe64f1cc643d0b9fbff9a51f3068c |
| institution | Kabale University |
| issn | 1687-8337 1687-8345 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
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| series | International Journal of Endocrinology |
| spelling | doaj-art-49dfe64f1cc643d0b9fbff9a51f3068c2025-02-03T01:23:34ZengWileyInternational Journal of Endocrinology1687-83371687-83452018-01-01201810.1155/2018/45219844521984Malignancy Risk and Related Factors of Atypia of Undetermined Significance/Follicular Lesion of Undetermined Significance in Thyroid Fine Needle AspirationSo-hyeon Hong0Hyejin Lee1Min-Sun Cho2Jee Eun Lee3Yeon-Ah Sung4Young Sun Hong5Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of KoreaDivision of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, Republic of KoreaDepartment of Pathology, College of Medicine, Ewha Womans University, Seoul, Republic of KoreaDepartment of Radiology, College of Medicine, Ewha Womans University, Seoul, Republic of KoreaDivision of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, Republic of KoreaDivision of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, Republic of KoreaAtypia of undetermined significance/follicular lesion of undetermined significance (AUS/FLUS) in thyroid fine needle aspiration (FNA) is a challenging category. The malignancy risk is different by multiple factors and subsequent management strategy is inconclusive. Therefore, we analyzed the malignancy risk of AUS/FLUS according to radiological and clinical features. A total of 687 nodules that had been initially diagnosed as AUS/FLUS were retrospectively reviewed from 6365 thyroid FNAs between 2011 and 2014. The ultrasonographic (US) features were categorized using the Korean Thyroid Imaging Reporting and Data System. Radiological and clinical features were compared according to the second FNA results or histologically confirmed results from surgery. Repeat FNA was performed on 248 (36%) nodules, and 49 (7%) nodules underwent immediate surgery. Among the 248 nodules subjected to repeated FNA, 49 (20%) nodules were diagnosed again as AUS/FLUS, 123 (50%) were found to be benign, and 47 (19%) were diagnosed as follicular neoplasm, suspicious for malignancy or malignant. Among histologically confirmed nodules, the US features were more unfavorable in malignant nodules, and hypo- or anechogenicity was associated with a higher risk of malignancy after adjusting for age, size, and other US features (P<0.01). In conclusion, we observed that malignant nodules tended to show unfavorable US features, especially hypo- or anechogenicity. Age, sex, and thyroid function were not significantly associated with malignancy risk. We also found out that malignancy risk was not different between the group which underwent immediate operation following the AUS/FLUS diagnosis and the group which underwent repeated FNA after the initial diagnosis.http://dx.doi.org/10.1155/2018/4521984 |
| spellingShingle | So-hyeon Hong Hyejin Lee Min-Sun Cho Jee Eun Lee Yeon-Ah Sung Young Sun Hong Malignancy Risk and Related Factors of Atypia of Undetermined Significance/Follicular Lesion of Undetermined Significance in Thyroid Fine Needle Aspiration International Journal of Endocrinology |
| title | Malignancy Risk and Related Factors of Atypia of Undetermined Significance/Follicular Lesion of Undetermined Significance in Thyroid Fine Needle Aspiration |
| title_full | Malignancy Risk and Related Factors of Atypia of Undetermined Significance/Follicular Lesion of Undetermined Significance in Thyroid Fine Needle Aspiration |
| title_fullStr | Malignancy Risk and Related Factors of Atypia of Undetermined Significance/Follicular Lesion of Undetermined Significance in Thyroid Fine Needle Aspiration |
| title_full_unstemmed | Malignancy Risk and Related Factors of Atypia of Undetermined Significance/Follicular Lesion of Undetermined Significance in Thyroid Fine Needle Aspiration |
| title_short | Malignancy Risk and Related Factors of Atypia of Undetermined Significance/Follicular Lesion of Undetermined Significance in Thyroid Fine Needle Aspiration |
| title_sort | malignancy risk and related factors of atypia of undetermined significance follicular lesion of undetermined significance in thyroid fine needle aspiration |
| url | http://dx.doi.org/10.1155/2018/4521984 |
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