Tae Hyuk Kim1, Chang-Seok Ki2, Soo Yeon Hahn3, Young Lyun Oh4, Hye Won Jang5, Sun Wook Kim1, Jae Hoon Chung6, Jung Hee Shin7. 1. Division of Endocrinology & Metabolism, Department of Medicine, Thyroid Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. 2. Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. 3. Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. 4. Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. 5. Department of Medical Education, Sungkyunkwan University School of Medicine, Seoul, Korea. 6. Division of Endocrinology & Metabolism, Department of Medicine, Thyroid Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. thyroid@skku.edu. 7. Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. jhshin11@skku.edu.
Abstract
PURPOSE: Telomerase reverse transcriptase promoter mutations are found in highly aggressive thyroid malignancies. Our aim was to define the ultrasonographic features of telomerase reverse transcriptase promoter-mutated papillary thyroid cancer and to evaluate their predictive performances. METHODS: Ultrasonographic findings were reviewed for 185 patients with surgically confirmed papillary thyroid cancer between 1994 and 2004. Genomic DNA to identify telomerase reverse transcriptase promoter mutations was extracted from archived surgical specimens. Logistic regression analysis was performed to compare clinical factors and ultrasonographic findings between telomerase reverse transcriptase promoter-mutated and wild-type papillary thyroid cancers. RESULTS: A telomerase reverse transcriptase promoter mutation was detected in 8.1% (15 of 185) of specimens from papillary thyroid cancer patients with a strong trend toward increasing age. Nonparallel orientation and microlobulated margin were independent ultrasonographic findings for predicting telomerase reverse transcriptase promoter-mutated papillary thyroid cancer in patients over 50 years (odds ratio 5.898, 95% confidence interval 1.092-31.851, P = 0.039 for orientation; odds ratio 5.813, 95% confidence interval 1.320-25.602, P = 0.020 for margin). Prevalence of telomerase reverse transcriptase promoter mutations increased to 50.0% in papillary thyroid cancer patients older than 50 years with both ultrasonographic findings and was 0% in patients without either finding. For identifying telomerase reverse transcriptase promoter-mutated papillary thyroid cancer, ultrasonographic had 64.3% sensitivity, 80.8% specificity, 50.0% positive predictive value and 88.4% negative predictive value. CONCLUSIONS: Telomerase reverse transcriptase promoter-mutated papillary thyroid cancer could be suggested by the ultrasonographic features of nonparallel orientation and microlobulated margin in patients older than 50 years. Prebiopsy recognition of this unique ultrasonographic pattern would mandate the nodule fall into a "biopsy suggested" category.
PURPOSE: Telomerase reverse transcriptase promoter mutations are found in highly aggressive thyroid malignancies. Our aim was to define the ultrasonographic features of telomerase reverse transcriptase promoter-mutated papillary thyroid cancer and to evaluate their predictive performances. METHODS: Ultrasonographic findings were reviewed for 185 patients with surgically confirmed papillary thyroid cancer between 1994 and 2004. Genomic DNA to identify telomerase reverse transcriptase promoter mutations was extracted from archived surgical specimens. Logistic regression analysis was performed to compare clinical factors and ultrasonographic findings between telomerase reverse transcriptase promoter-mutated and wild-type papillary thyroid cancers. RESULTS: A telomerase reverse transcriptase promoter mutation was detected in 8.1% (15 of 185) of specimens from papillary thyroid cancerpatients with a strong trend toward increasing age. Nonparallel orientation and microlobulated margin were independent ultrasonographic findings for predicting telomerase reverse transcriptase promoter-mutated papillary thyroid cancer in patients over 50 years (odds ratio 5.898, 95% confidence interval 1.092-31.851, P = 0.039 for orientation; odds ratio 5.813, 95% confidence interval 1.320-25.602, P = 0.020 for margin). Prevalence of telomerase reverse transcriptase promoter mutations increased to 50.0% in papillary thyroid cancerpatients older than 50 years with both ultrasonographic findings and was 0% in patients without either finding. For identifying telomerase reverse transcriptase promoter-mutated papillary thyroid cancer, ultrasonographic had 64.3% sensitivity, 80.8% specificity, 50.0% positive predictive value and 88.4% negative predictive value. CONCLUSIONS: Telomerase reverse transcriptase promoter-mutated papillary thyroid cancer could be suggested by the ultrasonographic features of nonparallel orientation and microlobulated margin in patients older than 50 years. Prebiopsy recognition of this unique ultrasonographic pattern would mandate the nodule fall into a "biopsy suggested" category.
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