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Xiaowen Zhang Department of Endocrinology, Drum Tower Hospital affiliated to Nanjing University Medical School, Branch of National Clinical Research Centre for Metabolic Diseases, Endocrine and Metabolic Disease Medical Center, Drum Tower Hospital affiliated to Nanjing University Medical School, Nanjing, China

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Chen Han Department of Endocrinology, Drum Tower Hospital affiliated to Nanjing University Medical School, Branch of National Clinical Research Centre for Metabolic Diseases, Endocrine and Metabolic Disease Medical Center, Drum Tower Hospital affiliated to Nanjing University Medical School, Nanjing, China
Department of Endocrinology and Metabolism, Drum Tower Clinical Medical College, Southeast University, Nanjing, China

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Hongwei Wang State Key Laboratory of Analytical Chemistry for Life Science & Jiangsu Key Laboratory of Molecular Medicine, Nanjing University School of Medicine, Nanjing, China

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Xinghong Sun Department of Ophthalmology, Nanjing University Medical School Affiliated Drum Tower Hospital, Nanjing, China

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Xin Dou Department of Radiology, Nanjing University Medical School Affiliated Drum Tower Hospital, Nanjing, China

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Xueying He Department of Radiology, Nanjing University Medical School Affiliated Drum Tower Hospital, Nanjing, China

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Di Wu Department of Radiology, Southeast University Medical School Affiliated Zhongda Hospital, Nanjing, China

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Shanmei Shen Department of Endocrinology, Drum Tower Hospital affiliated to Nanjing University Medical School, Branch of National Clinical Research Centre for Metabolic Diseases, Endocrine and Metabolic Disease Medical Center, Drum Tower Hospital affiliated to Nanjing University Medical School, Nanjing, China

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Dalong Zhu Department of Endocrinology, Drum Tower Hospital affiliated to Nanjing University Medical School, Branch of National Clinical Research Centre for Metabolic Diseases, Endocrine and Metabolic Disease Medical Center, Drum Tower Hospital affiliated to Nanjing University Medical School, Nanjing, China

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Xinlin Zhang Department of Cardiology, Nanjing University Medical School Affiliated Drum Tower Hospital, Nanjing, China

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Yan Bi Department of Endocrinology, Drum Tower Hospital affiliated to Nanjing University Medical School, Branch of National Clinical Research Centre for Metabolic Diseases, Endocrine and Metabolic Disease Medical Center, Drum Tower Hospital affiliated to Nanjing University Medical School, Nanjing, China

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Thyroid eye disease (TED) is the major extrathyroidal manifestation of Graves’ disease (GD). Treatment choice is based on clinical activity and severity of TED, as evaluated with clinical activity score (CAS) and magnetic resonance (MR) imaging. We aimed to determine the relationship between neutrophil-to-lymphocyte ratio (NLR), a readily available indicator of systemic inflammation, and clinical and MR imaging parameters in TED patients. Eighty-seven consecutive TED patients were included. The average signal intensity ratio (SIR), average extraocular muscle (EOM) diameter, and proptosis of the study eye were extracted from MR images. A baseline NLR ≥ 2.0 was recorded in 37 (42.5%) patients and NLR < 2.0 in 50 (57.5%) patients. TED patients with NLR ≥ 2.0 were older, had a higher CAS, average SIR, average EOM diameter and proptosis, and a lower serum thyrotrophin receptor antibody level than patients with NLR < 2.0 (all P < 0.05). All MR parameters showed significant correlation with CAS (P < 0.05). NLR correlated significantly with CAS (P = 0.001), average SIR (P = 0.004), average EOM diameter (P = 0.007), and proptosis (P = 0.007). Multiple regression revealed a significant correlation between NLR and CAS (P = 0.001), average SIR (P = 0.029), and proptosis (P = 0.037). Cox regression analysis showed that a high NLR at baseline was associated with a worse clinical outcome of TED (hazard ratio 3.7, 95% CI 1.22–11.2, P = 0.02), at a median follow-up of 25 months. In conclusion, NLR was correlated with CAS and MR imaging parameters and was associated with a worse clinical outcome of TED at follow-up in patients with TED. Additional prospective studies are needed to validate our findings.

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Ya Zhang Endocrine and Diabetes Center, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China

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Xiaoqiu Chu Endocrine and Diabetes Center, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China

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Yuling Liu Department of Endocrinology, Zaozhuang Municipal Hospital, Zaozhuang, China

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Yueting Zhao Endocrine and Diabetes Center, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China

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Xue Han Endocrine and Diabetes Center, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China

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Xin Hu Endocrine and Diabetes Center, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China

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Pingping Xiang Endocrine and Diabetes Center, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China
Key Laboratory of TCM Syndrome and Treatment of Yingbing (Thyroid Disease) of State Administration of Traditional Chinese Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China

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Guofang Chen Endocrine and Diabetes Center, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China
Key Laboratory of TCM Syndrome and Treatment of Yingbing (Thyroid Disease) of State Administration of Traditional Chinese Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China

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Chao Liu Endocrine and Diabetes Center, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China
Key Laboratory of TCM Syndrome and Treatment of Yingbing (Thyroid Disease) of State Administration of Traditional Chinese Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China

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Shuhang Xu Endocrine and Diabetes Center, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China

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Objective

To compare the efficacy and safety of ethanol ablation (EA) and microwave ablation (MWA) in the treatment of cystic or predominantly cystic thyroid nodules.

Methods

Patients with cystic or predominantly cystic thyroid nodules intervened with EA or MWA were retrospectively enrolled and divided into EA group (n  = 30) and MWA group (n  = 31). The volume and volume reduction rate (VRR) of thyroid nodules before ablation, and at 3 and 12 months after ablation were compared between the two groups. The effective rate (ER) and incidence of adverse events in both groups were recorded.

Results

The median VRR and ER at 3 months after ablation were significantly higher in EA group than in MWA group (81.30% vs 75.76%, P = 0.011; 76.67% (23/30) vs 51.61% (16/31), P = 0.040), while no significant difference was detected at 12 months (93.39% vs 88.78%, P = 0.141; 86.67% (26/30) vs 87.10% (27/31), P = 0.960). The median VRR of small nodules in EA group was significantly higher than that in MWA group (81.30% vs 71.18%, P = 0.006; 93.40% vs 83.14%, P = 0.032). There was no significant difference of median VRR in medium nodules at final follow-up between MWA and EA group (93.01% vs 89.68%, P = 0.482). Serious adverse events were not reported in both groups.

Conclusion

EA and MWA are both effective and safe in the treatment of cystic or predominantly cystic thyroid nodules. EA is more cost-effective and effective than MWA for small nodules, but it requires more cycles of treatment and may pose a higher risk of postoperative pain compared with MWA.

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Leqi He Department of Clinical Laboratory Medicine, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Xiaoying Li Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Zaoping Chen Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Wei Wang Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Kai Wang Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Xinmei Huang Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Qian Yang Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Wencai Ke Department of Clinical Laboratory Medicine, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Jun Liu Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Bingbing Zha Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Objective

To explore the relationship between estradiol (E2) and thyroid function during the second trimester of pregnancy and the effect of E2 on sodium iodide transporter (NIS) expression in cultured thyroid cells.

Materials and methods

We analyzed relationships between E2 and thyroid function in 196 pregnant women during the second trimester. Multiple linear regression analysis was performed between E2 and thyroid function. The human thyroid Nthy-ori3-1 cells were cultured in different E2 concentrations, and the mRNA levels of NIS, estrogen receptor (ER)-α, and ER-β were measured by quantitative real-time PCR. Their protein levels were assessed by western blot.

Results

E2 was positively correlated with thyroid-stimulating hormone (TSH) and negatively correlated with free thyroxine (FT4) (P < 0.05). When we corrected for age, BMI, alanine aminotransferase, and serum creatinine, E2 was still negatively correlated with FT4 (P < 0.5) during the second trimester. In Nthy-ori3-1 cells treated with 10 nM E2, NIS and ER-β mRNA levels were significantly reduced, while ER-α mRNA level was not altered (P > 0.5). Moreover, 10 nM E2 significantly decreased protein levels of ER-β, phosphorylated versions of protein kinase A (p-PKA), phosphorylated versions of cAMP response element-binding protein (p-CREB), and NIS, while treatment with the ER-β inhibitor restored the expression of p-PKA, p-CREB, and NIS (P < 0.05).

Conclusion

High concentration of E2 has a negative correlation with FT4. High concentration of E2 can inhibit the NIS expression through the ER-β-mediated pathway, which may cause thyroid hormone fluctuations during pregnancy.

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Elizabeth J de Koster Department of Radiology and Nuclear Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands

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Olga Husson Department of Psychosocial Research and Epidemiology, Netherlands Cancer Institute, Amsterdam, The Netherlands
Division of Medical Oncology, Netherlands Cancer Institute, Amsterdam, The Netherlands
Division of Clinical Studies, Institute of Cancer Research, London, UK

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Eveline W C M van Dam Department of Internal Medicine, Division of Endocrinology, location VU University Medical Center, Amsterdam University Medical Centers, Amsterdam, The Netherlands

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G Sophie Mijnhout Department of Internal Medicine, Isala Hospital, Zwolle, The Netherlands

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Romana T Netea-Maier Department of Internal Medicine, Division of Endocrinology, Radboud University Medical Centre, Nijmegen, The Netherlands

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Wim J G Oyen Department of Radiology and Nuclear Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
Department of Radiology and Nuclear Medicine, Rijnstate Hospital, Arnhem, The Netherlands
Department of Biomedical Sciences and Humanitas Clinical and Research Centre, Department of Nuclear Medicine, Humanitas University, Milan, Italy

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Marieke Snel Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, The Netherlands

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Lioe-Fee de Geus-Oei Department of Radiology and Nuclear Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
Department of Radiology, Section of Nuclear Medicine, Leiden University Medical Center, Leiden, The Netherlands
Biomedical Photonic Imaging Group, University of Twente, Enschede, The Netherlands

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Dennis Vriens Department of Radiology, Section of Nuclear Medicine, Leiden University Medical Center, Leiden, The Netherlands

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for the EfFECTS trial study group
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Objective

This study assessed the health-related quality of life (HRQoL) in patients undergoing 2-[18F]fluoro-2-deoxy-D-glucose (FDG)-PET/CT for an indeterminate (Bethesda III/IV) thyroid nodule. FDG-PET/CT accurately rules out malignancy and prevents 40% of futile diagnostic surgeries in these nodules.

Design

Secondary analyses of HRQoL data from a randomised controlled multicentre trial (NCT02208544) in 126 patients from 15 hospitals in the Netherlands were done.

Methods

Longitudinal HRQoL assessment was performed using the EuroQol 5-dimension 5-level (EQ-5D-5L), the RAND 36-item Health Survey v2.0 (RAND-36), and the Thyroid Patient-Reported Outcome (ThyPRO) questionnaire on baseline, 3, 6, and 12 months, relative to the date of the FDG-PET/CT scan.

Results

Patients who were randomised to active surveillance following an FDG-negative nodule instead of diagnostic surgery reported stable HRQoL scores throughout the year. Univariate analysis indicated better HRQoL for patients undergoing surveillance than surgical patients with benign histopathology on multiple physical and psychosocial domains. Univariate within-group analysis suggested both temporary and continued HRQoL deteriorations in patients with benign histopathology over time. Multivariate within-group analysis demonstrated no significant longitudinal HRQoL changes in patients undergoing active surveillance. In contrast, in patients with benign histopathology, worse HRQoL was observed with regard to ThyPRO cognitive impairment (P = 0.01) and cosmetic complaints (P = 0.02), whereas goitre symptoms (P < 0.001) and anxiety (P = 0.04) improved over time. In patients with malignant histopathology, anxiety also decreased (P = 0.05).

Conclusions

The reassurance of a negative FDG-PET/CT resulted in sustained HRQoL throughout the first year of active surveillance. Diagnostic surgery for a nodule with benign histopathology resulted in more cognitive impairment and physical problems including cosmetic complaints, but improved goitre symptoms and anxiety. Anxiety was also reduced in patients with malignant histopathology.

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Ling Sun Department of Cardiology, The Affiliated Changzhou No.2 People’s Hospital of Nanjing Medical University, Changzhou, Jiangsu, China
Section of Pacing and Electrophysiology, Division of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China

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Wenwu Zhu Department of Cardiology, Xuzhou Central Hospital, Xuzhou Clinical School of Nanjing Medical University, Xuzhou, Jiangsu, China

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Yuan Ji Department of Cardiology, The Affiliated Changzhou No.2 People’s Hospital of Nanjing Medical University, Changzhou, Jiangsu, China

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Ailin Zou Department of Cardiology, The Affiliated Changzhou No.2 People’s Hospital of Nanjing Medical University, Changzhou, Jiangsu, China

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Lipeng Mao Department of Cardiology, The Affiliated Changzhou No.2 People’s Hospital of Nanjing Medical University, Changzhou, Jiangsu, China
Dalian Medical University, Dalian, Liaoning, China

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Boyu Chi Department of Cardiology, The Affiliated Changzhou No.2 People’s Hospital of Nanjing Medical University, Changzhou, Jiangsu, China
Dalian Medical University, Dalian, Liaoning, China

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Jianguang Jiang Department of Cardiology, The Affiliated Changzhou No.2 People’s Hospital of Nanjing Medical University, Changzhou, Jiangsu, China

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Xuejun Zhou Department of Cardiology, The Affiliated Changzhou No.2 People’s Hospital of Nanjing Medical University, Changzhou, Jiangsu, China

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Qingjie Wang Department of Cardiology, The Affiliated Changzhou No.2 People’s Hospital of Nanjing Medical University, Changzhou, Jiangsu, China

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Fengxiang Zhang Section of Pacing and Electrophysiology, Division of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China

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Objective

Post-treatment contrast-induced acute kidney injury (CI-AKI) is associated with poor outcomes in patients with acute myocardial infarction (AMI). A lower free triiodothyronine (FT3) level predicts a poor prognosis of AMI patients. This study evaluated the effect of plasma FT3 level in predicting CI-AKI and short-term survival among AMI patients.

Methods

Coronary arteriography or percutaneous coronary intervention was performed in patients with AMI. A 1:3 propensity score (PS) was used to match patients in the CI-AKI group and the non-CI-AKI group.

Results

Of 1480 patients enrolled in the study, 224 (15.1%) patients developed CI-AKI. The FT3 level was lower in CI-AKI patients than in non-CI-AKI patients (3.72 ± 0.88 pmol/L vs 4.01 ± 0.80 pmol/L, P < 0.001). Compared with those at the lowest quartile of FT3, the patients at quartiles 2–4 had a higher risk of CI-AKI respectively (P for trend = 0.005). The risk of CI-AKI increased by 17.7% as FT3 level decreased by one unit after PS-matching analysis (odds ratio: 0.823; 95% CI: 0.685–0.988, P = 0.036). After a median of 31 days of follow-up (interquartile range: 30–35 days), 78 patients died, including 72 cardiogenic deaths and 6 non-cardiogenic deaths, with more deaths in the CI-AKI group than in the non-CI-AKI group (53 vs 25, P < 0.001). Kaplan–Meier survival analysis showed that patients at a lower FT3 quartile achieved a worse survival before and after matching.

Conclusion

Lower FT3 may increase the risk of CI-AKI and 1-month mortality in AMI patients.

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Carmen Sydlik Division of Pediatric Endocrinology, Center for Pediatric and Adolescent Medicine Inn-Salzach-Rott, Altoetting, Germany

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Ilja Dubinski Division of Pediatric Endocrinology, Dr. von Hauner Children's Hospital, University Hospital Munich, LMU Munich, Munich, Germany

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Susanne Bechtold Division of Pediatric Endocrinology, Dr. von Hauner Children's Hospital, University Hospital Munich, LMU Munich, Munich, Germany

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Heinrich Schmidt Division of Pediatric Endocrinology, Dr. von Hauner Children's Hospital, University Hospital Munich, LMU Munich, Munich, Germany

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Thyroid-stimulating hormone is generally regarded as a standard parameter for the evaluation of thyroid function. However, relying on this hormone alone can be misleading. Therefore, thyroxine/free-thyroxine levels are used in patients with levothyroxine substitution for the adjustment of therapy. Even with normal values for free thyroxine, decreased values for the free-triiodothyronine/free-thyroxine ratio have already been described in adults. In this study, the free-triiodothyronine/free-thyroxine ratio of 25 children with congenital hypothyroidism was compared with 470 healthy children seen for other reasons and then for thyroid dysfunction. Mean free thyroxine in congenital hypothyroidism was just below the upper limit of normal and significantly higher than in control group. Mean values for free triiodothyronine showed no significant difference between the two groups. The mean value for the free triiodothyronine/free-thyroxine ratio in control group was 3.23. Significantly lower ratios were found in the congenital hypothyroidism group with a mean value of 2.5, due to higher values for free thyroxine compared to free triiodothyronine. Furthermore, an increased free triiodothyronine/free-thyroxine ratio was found at higher thyroid-stimulating hormone values due to lower values for free thyroxine. In this study, we demonstrate that the free triiodothyronine/free-thyroxine ratio was significantly lower in children with congenital hypothyroidism compared to the control group. This is most likely due to the higher values for free thyroxine in this group compared to similar values for free triiodothyronine in both groups. Further studies with differentiated thyroid hormone therapy are needed in order to understand the role of peripheral euthyroidism.

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Sara Ahmadi Thyroid Section Brigham & Women’s Hospital & Harvard Medical School, Boston, Massachusetts, USA

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Alexandra Coleman Thyroid Section Brigham & Women’s Hospital & Harvard Medical School, Boston, Massachusetts, USA

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Nathalie Silva de Morais Thyroid Section Brigham & Women’s Hospital & Harvard Medical School, Boston, Massachusetts, USA
Endocrinology Service, Instituto Nacional de Câncer, Rio de Janeiro, Brazil

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Iñigo Landa Thyroid Section Brigham & Women’s Hospital & Harvard Medical School, Boston, Massachusetts, USA

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Theodora Pappa Thyroid Section Brigham & Women’s Hospital & Harvard Medical School, Boston, Massachusetts, USA

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Alex Kang Thyroid Section Brigham & Women’s Hospital & Harvard Medical School, Boston, Massachusetts, USA

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Matthew I Kim Thyroid Section Brigham & Women’s Hospital & Harvard Medical School, Boston, Massachusetts, USA

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Ellen Marqusee Thyroid Section Brigham & Women’s Hospital & Harvard Medical School, Boston, Massachusetts, USA

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Erik K Alexander Thyroid Section Brigham & Women’s Hospital & Harvard Medical School, Boston, Massachusetts, USA

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Background

Planar scintigraphy has long been indicated in patients receiving I-131 therapy for thyroid cancer to determine the anatomic location of metastases. We studied our experience upon implementing additional single-photon emission (SPECT)-CT scanning in these patients.

Method

We performed a retrospective study of consecutive adult patients with newly diagnosed thyroid cancer treated with I-131 between 2011 and 2017. Radiologic findings detected with planar scintigraphy alone vs those identified with SPECT-CT scanning were primary endpoints.

Result

In this study, 212 consecutive patients with thyroid cancer were analyzed in two separate cohorts (107 planar scintigraphy alone and 105 planar scintigraphy with SPECT-CT). The addition of SPECT-CT resulted in more findings, both thyroid-related and incidental. However, we identified only 3 of 21 cases in which SPECT-CT provided an unequivocal additional benefit by changing clinical management beyond planar scintigraphy alone. No difference in the detection of distant metastatic disease or outcome was identified between cohorts.

Conclusion

Synergistic SPECT-CT imaging in addition to planar nuclear scintigraphy adds limited clinical value to thyroid cancer patients harboring a low risk of distant metastases, while frequently identifying clinically insignificant findings. These data from a typical cohort of patients receiving standard thyroid cancer care provide insight into the routine use of SPECT-CT in such patients.

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Xiaoya Zheng Department of Endocrinology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China

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Heng Xiao Department of Hepatobiliary Surgery, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China

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Jian Long Department of Endocrinology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China

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Qiang Wei Prevention of Disease Department, Chongqing Jiulongpo District Hospital of Traditional Chinese Medicine, Chongqing, China

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Liping Liu Department of Ultrasound, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China

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Liping Zan Department of Endocrinology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China

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Wei Ren Department of Endocrinology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China

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Objective

Programmed cell death protein-1 (PD-1) inhibitors are widely used for the treatment of hepatocellular carcinoma (HCC). Thyroid dysfunction is common in patients treated with this therapy, although the dynamic changes in thyroid function and sonographic features remain unclear.

Methods

We analyzed 38 patients with HCC who received anti-PD-1 therapy at our hospital. Demographic, clinical, laboratory, and ultrasound data were extracted from electronic medical records. The grading of thyroid nodules was based on the American College of Radiology Thyroid Imaging Reporting and Data System classification. Statistical analyses were performed using GraphPad Prism 5.0.

Results

Fifteen patients (40%) had hypothyroidism, among which six had hypothyroidism at baseline, three had overt hypothyroidism, and six had subclinical hypothyroidism after anti-PD1 therapy. The proportion of patients with euthyroid function and thyroid antibody positivity was significantly lower than that of patients with thyroid dysfunction (10% vs 39%, P  < 0.05). Nine patients (24%) had irregular echo patterns on sonographic imaging, six of whom had irregular echo patterns present during the treatment, but only one had them persist until the end of treatment. At baseline, the classification of most thyroid nodules was grade 3, with a significant increase in grade 4A and 4B classifications during treatment, though most nodules remained grade 3 at the end of treatment. There were no significant differences in survival rates between the euthyroid and thyroid dysfunction groups.

Conclusion

Anti-PD-1 therapy-induced thyroid dysfunction was accompanied by changes in thyroid function, antibodies, and ultrasonography. Therefore, in patients receiving anti-PD-1 therapy, close, dynamic monitoring of thyroid function, antibodies, and ultrasonographic characteristics is necessary.

Open access
Lian Duan Department of Nuclear Medicine, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China

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Han-Yu Zhang Changzhi Medical College, Changzhi, Shanxi, China

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Min Lv Department of Nuclear Medicine, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China

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Han Zhang Changzhi Medical College, Changzhi, Shanxi, China

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Yao Chen Changzhi Medical College, Changzhi, Shanxi, China

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Ting Wang Department of Nuclear Medicine, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China

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Yan Li Department of Nuclear Medicine, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China

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Yan Wu Department of Clinical Laboratory, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China

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Junfeng Li Department of Radiology, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China

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Kefeng Li School of Medicine, University of California, San Diego, California, USA

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Background and objective

Radioiodine therapy (RAI) is one of the most common treatment solutions for Graves’ disease (GD). However, many patients will develop hypothyroidism as early as 6 months after RAI. This study aimed to implement machine learning (ML) algorithms for the early prediction of post-RAI hypothyroidism.

Methods

Four hundred and seventy-one GD patients who underwent RAI between January 2016 and June 2019 were retrospectively recruited and randomly split into the training set (310 patients) and the validation set (161 patients). These patients were followed for 6 months after RAI. A set of 138 clinical and lab test features from the electronic medical record (EMR) were extracted, and multiple ML algorithms were conducted to identify the features associated with the occurrence of hypothyroidism 6 months after RAI.

Results

An integrated multivariate model containing patients’ age, thyroid mass, 24-h radioactive iodine uptake, serum concentrations of aspartate aminotransferase, thyrotropin-receptor antibodies, thyroid microsomal antibodies, and blood neutrophil count demonstrated an area under the receiver operating curve (AUROC) of 0.72 (95% CI: 0.61–0.85), an F1 score of 0.74, and an MCC score of 0.63 in the training set. The model also performed well in the validation set with an AUROC of 0.74 (95% CI: 0.65–0.83), an F1 score of 0.74, and a MCC of 0.63. A user-friendly nomogram was then established to facilitate the clinical utility.

Conclusion

The developed multivariate model based on EMR data could be a valuable tool for predicting post-RAI hypothyroidism, allowing them to be treated differently before the therapy. Further study is needed to validate the developed prognostic model at independent sites.

Open access
Kjersti S Bakken Women’s Clinic, Innlandet Hospital Trust, Lillehammer, Norway
Center for International Health, University of Bergen, Bergen, Norway

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Kristina Randjelovic Nermo Center for International Health, University of Bergen, Bergen, Norway
Department of Microbiology, Innlandet Hospital Trust, Lillehammer, Norway

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Bjørn Gunnar Nedrebø Department of Medicine, Haugesund Hospital, Haugesund, Norway
Department of Clinical Science, University of Bergen, Bergen, Norway

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Tim I M Korevaar Academic Center for Thyroid Diseases, Erasmus University Medical Center, Rotterdam, the Netherlands

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Tor A Strand Center for International Health, University of Bergen, Bergen, Norway
Department of Research, Innlandet Hospital Trust, Lillehammer, Norway

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Objective

Thyroid disease during pregnancy is associated with adverse pregnancy outcomes and suboptimal fetal development. During the last decades, guidelines for diagnosing thyroid disease during pregnancy have changed considerably and there has been increased awareness. This study aimed to describe the prevalence of thyroid disease treatment over time among pregnant women in Norway.

Design

Nationwide register-based study.

Methods

We combined historical data from the Medical Birth Registry of Norway and the Norwegian Prescription Database, identifying pregnant women using thyroid therapy from 2004 to 2018.

Results

A total of 855,067 pregnancies were included in the analyses. The proportion of women using thyroid hormone replacement therapy during pregnancy increased from 1.46% (n  = 800) in 2004 to 3.57% (n  = 1940) in 2018. The proportion of women using antithyroid medications also increased from 0.04% (n  = 20) in 2004 to 0.10% (n  = 56). During these 15 years, the mean maternal age increased by 0.9 years. When adjusting for age, the risk for being on thyroid hormone replacement therapy during pregnancy increased by an average of 5% per year (odds ratio: 1.05, 95% CI: 1.05–1.05).

Conclusion

During the recent 15 years, there has been a substantial increase in the use of thyroid hormone therapy in Norwegian pregnant women. We speculate that this could be due to an increased awareness in combination with overdiagnosis because of inappropriate diagnostic criteria. To truly understand the possible causes and consequences of this development, further research is warranted.

Open access