Ultrasound in Ti-Rads Classification of Thyroid Nodules at the Marie Curie Medical Clinic

Introduction: A thyroid nodule is a localized hypertrophy within the thyroid parenchyma. The aim of our study was to study the benefit of ultrasound in the Ti-rads classification of thyroid nodules. Methodology: This was a prospective study with a descriptive aim, with prospective collection, which took place over a period of 17 months at the “Marie Curie” medical clinic. The ultrasound machine used was a Voluson E8 from 2011 and the examinations were carried out by two radiologists and two experienced sonographers. The parameters studied were sociodemographic data;clinical data and ultrasound aspects of the Ti-rads classification in the management of nodules. Results: We collected 235 patients out of 738 patients referred to the service for a cervical ultrasound, i.e. a frequency of 31.84% of cases. There was a female predominance with 95.7% of cases and a sex ratio of 0.04. The average age of our patients was 50 years. We found on cervical ultrasound: Isthmo-lobar glandular hyperplasia in 99 patients, i.e. a frequency of 42.1%. The Ti-rads 3 classification was the most represented in 69.4% of cases. The benignity criterion represented 85.6% of cases in our patients and the malignancy criterion represented 14.4% of cases. Conclusion: The precise description of a thyroid nodule provided by ultrasound (Ti-rads) is essential in the management of nodules.

Treatment of 198 Cases of Thyroid Nodules with Sanying Capsule Combined with Xiaoying Patch

[Objectives]To observe the clinical efficacy of Sanying capsule combined with Xiaoying Patch in treating thyroid nodule(TN).[Methods]Two groups were treated similarly,with 200 cases in the control group undergoing basic treatment for 12 weeks and 198 cases in the observation group receiving Sanying capsule combined with Xiaoying patches for the same duration.The clinical symptoms,number of nodules,diameter of the largest nodule,and maximum reduction of nodules were observed before and after treatment.A control analysis was performed,and the underlying mechanisms were explored.[Results]The primary symptoms of the observation group exhibited a more favorable improvement than those of the control group.Additionally,the number of nodules decreased,the diameter of the largest nodule decreased,and the maximum reduction of nodules decreased in both groups following treatment.However,the observation group demonstrated a more pronounced improvement than the control group(P<0.05).[Conclusions]The combination of Sanying capsule and Xiaoying patch has been demonstrated to be an effective treatment for TN,with a high degree of reliability in terms of safety.

Pathological and Clinical Correlation European Union-Thyroid Imaging Reporting and Data System (EU-TIRADS) Classification of Thyroid Nodules in Two University Hospitals in Cotonou

Introduction: Since its creation in 2017 by the European community, the EU-TIRADS classification has enjoyed an excellent reputation in several countries around the world. Indeed, several studies conducted in these countries testify to the effectiveness of this tool for the management of nodular thyroid pathology. However, in Benin, the contribution of this classification has not yet been evaluated. It is therefore to overcome this inadequacy that we undertook this study. Objective: Participate in improving the diagnostic and therapeutic management of thyroid nodules at the CNHU HKM in Cotonou and at the CHUZ in Suru-Léré. Methods: This is a cross-sectional study with retrospective data collection spread over a period of 3 years 5 months, from January 2019 to May 2022 and carried out jointly in the Endocrinology Metabolism Nutrition and ORL-CCF departments of the CNHU HKM of Cotonou and in the ORL-CCF department of the CHUZ of Suru-Léré. The study population consisted of patients who consulted the University Clinic of Endocrinology Metabolism Nutrition, the University Clinic of ORL-CCF of the CNHU-HKM and the University Clinic of ORL-CCF of the CHUZ of Suru-Léré for thyroid nodule and who have had surgery. The study data was collected from patients hospitalization records using a survey form. Results: On ultrasound, according to the EU-TIRADS classification, 56.8% of nodules presented a low risk of malignancy (EU-TIRADS 3) compared to respectively 19.8%;23% and 2.5% of nodules with zero (EU-TIRADS 2), intermediate (EU-TIRADS 4) and high (EU-TIRADS 5) risk of malignancy. Regarding the performance of this classification, it is sensitive in 37.5% of cases and has a specificity of 78.5% with a PPV (Positive Predictive Value) and a NPV (Negative Predictive Value) respectively of 6.6 % and 91.6%. Furthermore, the bivariate correlations revealed that the size of the nodule was significantly associated with the malignancy of the nodule (p = 0.014) and the calculated value of the Yule’s Q coefficient (0.375) reflects a moderate intensity of the connection between the EU-TIRADS and histology. Conclusion: the EU-TIRADS classification, due to its excellent NPV, is of great interest for the management of thyroid nodules at the CNHU-HKM of Cotonou and at the CHUZ of Suru-Léré. In view of this, particular emphasis must be placed on its regular and rigorous use.

Diagnostic Value and Misdiagnosis Analysis of Conventional Ultrasonography Combined with Contrast-Enhanced Ultrasonography in Thyroid Nodules

Objective:To explore the diagnostic value of conventional ultrasonography combined with contrast-enhanced ultrasonography in thyroid nodules.Methods:From June 2021 to July 2022,163 patients with thyroid nodules enrolled in our hospital were selected as research subjects.After pathological diagnosis,24 cases were malignant thyroid nodules,and 139 cases were benign thyroid nodules.The diagnosis rate of malignant and benign thyroid nodules was observed and analyzed,with 95%CI.Results:Among them,the malignant and benign detection rates of routine ultrasound were 88.63%and 75.00%,respectively,and the malignant and benign detection rates of contrast-enhanced ultrasound were 81.82%and 81.25%,respectively.The malignant and benign detection rates of conventional ultrasound combined with contrast-enhanced ultrasound were 93.18%and 87.50%,respectively,and the 95%CI was greater than 0.7.Conclusion:Conventional ultrasound combined with contrast-enhanced ultrasound can help improve the diagnostic accuracy of benign and malignant thyroid nodules and reduce the misdiagnosis rate.

Increased Prevalence of Thyroid Nodules Across Nearly 10 Years in Shanghai,China

Objective This study aimed to determine whether the prevalence of thyroid nodules(TNs)increased due to modern lifestyles or other factors,despite the advances in screening and diagnostic tools.Methods This study included 3474 pairs of participants,who were matched by gender and age(±3 years)from two cross-sectional sampling surveys:(1)the program on the iodine nutritional status and related health status of residents in Shanghai in 2009;(2)the thyroid disease screening program for adults in Shanghai between 2017 and 2018.The prevalence of TNs and thyroid diseases in 2009 and 2017–2018 were compared,and the potential risk factors of TNs were detected.Results The prevalence of TNs in 2009 was 28.9%:22.5%in males and 34.5%in females.In 2017,this increased to 43.8%:37.9%in males and 49.1%in females.The prevalence of TNs significantly increased from 2009 to 2017(odds ratio,1.486;95%confidence interval,1.238–1.786).In addition,female gender,thyroid disease history,and age were the main risk factors for TNs after adjusting for confounders in the logistic regression across the time period.Conclusion The prevalence of TNs significantly increased across nearly 10 years in Shanghai.

Chronic infectious unilateral giant thyroid cyst related to diabetes mellitus:A case report

BACKGROUND Patients rarely develop complicated infections in thyroid cysts.Here,we describe a patient with chronic infected unilateral giant thyroid cyst related to diabetes mellitus(DM).CASE SUMMARY A 66-year-old male was admitted due to an evident neck lump for 5 d after approximately 40 years of gradually progressive neck mass and 7 years of DM.Doppler ultrasound and computed tomography scan showed a giant lump in the left thyroid gland lobe.He was diagnosed with a large thyroid nodule complicated by tracheal dislocation and had surgical indications.Surgical exploration revealed evident inflammatory edema and exudation between the left anterior neck muscles,the nodule and glandular tissue.Fortunately,inflammatory lesions did not affect major neck vessels.Finally,a left partial thyroidectomy was performed.Macroscopic observation showed that the cystic thyroid mass consisted of extensive cystic wall calcification and was rich in massive rough sand-like calculi content and purulent matter.Postoperative pathology confirmed benign thyroid cyst with chronic infection.CONCLUSION The progression of this chronic infectious unilateral giant thyroid cyst may have been related to DM,and identifying blood vessels involvement can prevent serious complications during operation.

Correlation analysis of serum thyroglobulin,thyroid-stimulating hormone levels,and thyroid-cancer risk in thyroid nodule surgery

BACKGROUND Thyroglobulin(Tg)is one of the markers of thyroid cancer,and its concentration may be elevated in patients with malignant thyroid tumors.Thyroid-stimulating hormone(TSH)is secreted by the pituitary gland,which has a significant impact on thyroid gland function.Excessively high or low TSH levels may be associated with an increased risk of thyroid cancer.Thus,in-depth studies on the association of serum Tg and TSH levels with thyroid cancer risk in patients with thyroid nodules are warranted.This can help determine whether Tg and TSH levels can predict the degree of malignancy of thyroid nodules,which can in turn guide doctors in making accurate diagnoses and treatment decisions.Furthermore,such studies can provide more accurate diagnostic methods for thyroid nodules and help patients become aware of the presence of thyroid cancer as early as possible,thereby improving the success rate of treatment and prognosis.AIM To investigate the association of serum Tg and TSH levels with the risk of thyroid cancer in patients undergoing thyroid nodule surgery.METHODS The clinical data and laboratory examination results of 130 patients who underwent thyroid nodule surgery were retrospectively analyzed.Furthermore,their preoperative serum Tg and TSH levels were recorded.Histopathological examination conducted during follow-up revealed the presence of thyroid cancer.Correlation analysis were used to analyze the association of Tg and TSH levels with the risk of thyroid cancer.RESULTS Of the 130 patients,60 were diagnosed with thyroid cancer.Statistical analysis revealed a significant positive correlation between serum Tg levels and the risk of thyroid cancer(P<0.05).This suggests that high serum Tg levels are associated with an increased risk of thyroid cancer.However,no significant correlation was observed between serum TSH levels and the risk of thyroid cancer(P>0.05).CONCLUSION In patients who underwent thyroid nodule surgery,serum Tg levels exhibited a significant correlation with the risk of thyroid cancer but serum TSH levels did not.These findings suggest that serum Tg can serve as an important biomarker for assessing the risk of thyroid cancer in these patients.

Prevalence of Thyroid Nodules and Its Relationship with Iodine Status in Shanghai:a Population-based Study

Objective This study was designed to evaluate the prevalence of thyroid nodules（TNs） and its relationship with urine iodine concentrations（UICs） after the regional rapid economic growth and lifestyle changes. Methods A cross-sectional survey was conducted in the general population aged 15-69 years. A questionnaire regarding general and personal characteristics and relevant information was administered. Ultrasonography of the thyroid was performed, and serum triiodothyronine（T3）, tetraiodothyronine（T4）, serum thyroid stimulating hormone（TSH）, free triiodothyronine（FT3）, free tetraiodothyronine（FT4）, thyroglobulin antibody（Tg Ab）, thyroid peroxidase antibody（TPOAb）, and TSH receptor antibody（TRAb） levels were measured for each individual subject. Results The prevalence rates of TNs in the whole population, females and males were 27.76%, 34.04%, and 21.60%, respectively. The prevalence of multiple nodules increased with age, whereas the prevalence peaks differed between males and females. The median UICs in the whole population and females with non-TNs were higher than those of subjects with TNs（P=0.0035, P=0.0068）. The median UICs in subjects with a single TN were higher than those in subjects with multiple TNs（P=0.0164, P=0.0127）. The result showed a U-shaped curve relationship between UIC and prevalence of TNs. The prevalence of TNs was the lowest when the UIC was 140-400 μg/L. Conclusion The prevalence of TNs was nearly 30% and increased with age. The relationship between UIC and prevalence of TNs is U-shaped, with an increase in risk when the UIC was 〈140 μg/L and 〉400 μg/L. Very low or high UIC levels need attention and correction.

Cytopathologic diagnosis of fine needle aspiration biopsies of thyroid nodules

Fine-needle aspiration(FNA) cytology is an important diagnostic tool in patients with thyroid lesions.Several systems have been proposed for the cyropathologic diagnosis of the thyroid nodules.However cases with indeterminate cytological findings still remain a matter of debate.In this review we analyze all literature regarding Thyroid Cytopathology Reporting systems trying to identify the most suitable methodology to use in clinical practice for the preoperative diagnosis of thyroid nodules.A review of the English literature was conducted,and data were analyzed and summarized and integrated from the authors' perspective.The main purpose of thyroid FNA is to identify patients with higher risk for malignancy,and to prevent unnecessary surgeries for benign conditions.The Bethesda System for Reporting Thyroid Cytopathology is the most widely used system for the diagnosis of thyroid FNA specimens.This system also contains guidelines for the diagnosis and treatment of indeterminate or suspicious for malignancy cases.In conclusion,patients who require repeated FNAs for indeterminate diagnoses will be resolved by repeat FNA in a percentage of 72%-80%.

Thyroid Nodules in Type 2 Diabetes Mellitus

The present analysis aims to investigate the prevalence of thyroid nodules in type 2 diabetes mellitus (T2DM) population.We searched PubMed,EMBASE,and Web of Science from inception to the March 1,2018.The studies were selected to estimate the prevalence of thyroid nodules in T2DM subjects and to compare the prevalence of thyroid nodules in different glucose tolerance status.The random effects model was used,and the outcome was presented as a pooled prevalence proportion with 95% confidence interval (95% CI) or a summary odds ratio (OR) with 95% CI.In the end,9 studies met the inclusion criteria and were included in the analysis.The pooled prevalence of thyroid nodules was 60%(95% CI:0.52,0.68) for T2DM 2 diabetes patients,50%(95% CI:0.4& 0.51) for pre-diabetes,and 43%(95% CI:0.34,0.52) for normal glucose tolerance population.Compared with patients without diabetes,diabetes subjects are more likely to develop thyroid nodules,adjusted OR for thyroid nodule was 1.78 (95% CI:1.25,2.55).Insulin resistance might be involved in thyroid nodule development.

Application of Real-time Ultrasound Elastography in Diagnosing Benign and Malignant Thyroid Solid Nodules

Objective Real-time ultrasound elastography(US-E) is a helpful tool in diagnosing thyroid nodules.This study aims to evaluate thyroid solid nodules,to establish the accuracy of US-E in providing information on the nature of these nodules,and to assess the clinical value of elasticity scores(ES) and strain ratio(SR) in differentiating thyroid solid nodules and to explore its distribution characteristics using pathological analysis as reference. Methods Traditional ultrasonography and US-E were performed on 131 thyroid solid nodules(99 benign ones and 32 malignant ones) in 120 patients(78 females and 41 males).Three radiologists evaluated the nodules based on a four-degree elasticity scoring system.The nodules were classified according to the ES as soft(ES 1-2) or hard(ES 3-4).The SR was calculated online. Results The sensitivity and specificity of the ES for thyroid cancer diagnosis were 78%and 80%,respectively.SR values > 2.9 used as a standard to distinguish benign from malignant nodules had a sensitivity of 87%and a specificity of 92%.The SR of the benign lesions was 1.64±1.37,which was significantly different from that of malignant lesions,which was 4.96±2.13(P<0.01). Conclusions Both the ES and SR were higher in malignant nodules than those in benign ones.Real-time US-E was a useful index in the differential diagnosis of thyroid solid nodules.It can provide quantitative information on thyroid nodule characterization and improve diagnostic confidence.

Quantitative differentiation of malignant and benign thyroid nodules with multi-parameter diffusion-weighted imaging

BACKGROUND The value of conventional magnetic resonance imaging in the differential diagnosis of thyroid nodules is limited;however,the value of multi-parameter diffusion-weighted imaging(DWI)in the quantitative evaluation of thyroid nodules has not been well determined.AIM To determine the utility of multi-parametric DWI including mono-exponential,biexponential,stretched exponential,and kurtosis models for the differentiation of thyroid lesions.METHODS Seventy-nine patients(62 with benign and 17 with malignant nodules)underwent multi-b value diffusion-weighted imaging of the thyroid.Multiple DWI parameters were obtained for statistical analysis.RESULTS Good agreement was found for diffusion parameters of thyroid nodules.Malignant lesions displayed lower diffusion parameters including apparent diffusion coefficient(ADC),the true diffusion coefficient(D),the perfusion fraction(f),the distributed diffusion coefficient(DDC),the intravoxel water diffusion heterogeneity(α)and kurtosis model-derived ADC(Dapp),and higher apparent diffusional kurtosis(Kapp)than benign entities(all P<0.01),except for the pseudodiffusion coefficient(D*)(P>0.05).The area under the ROC curve(AUC)of the ADC(0 and 1000)was not significantly different from that of the ADC(0 and 2000),ADC(0 to 2000),ADC(0 to 1000),D,DDC,Dapp and Kapp(all P>0.05),but was significantly higher than the AUC of D*,f andα(all P<0.05)for differentiating benign from malignant lesions.CONCLUSION Multiple DWI parameters including ADC,D,f,DDC,α,Dapp and Kapp could discriminate benign and malignant thyroid nodules.The metrics including D,DDC,Dapp and Kapp provide additional information with similar diagnostic performance of ADC,combination of these metrics may contribute to differentiate benign and malignant thyroid nodules.The ADC calculated with higher b values may not lead to improved diagnostic performance.

Real Time Ultrasound Elastography for the Differentiation of Benign and Malignant Thyroid Nodules

The purpose of this study was to evaluate the predictive value of real-time ultrasound elastography (RUE) in differentiating benign from malignant thyroid nodules, with fine needle aspiration cytology analysis as the reference standard. A total of 78 consecutive patients with thyroid nodules who were selected for fine needle aspiration biopsies were examined in this prospective study. 78 nodules in these patients were examined by conventional ultrasound, and ultrasound elastography. The final diagnosis was obtained from cytological findings. Tissue stiffness on ultrasound elastography was scored from 1 (low stiffness over the entire nodule) to 5 (high stiffness over the entire nodule and surrounding tissue). On real-time ultrasound elastography, 47 of 62 benign nodules (76%) had a score of 1 or 2, whereas 15 of 16 malignant nodules had a score of 3 to 5, with sensitivity of 93.7%, specificity of 90%, a positive predictive value of 71%, and a negative predictive value of 98%. Real-time ultrasound elastography is a promising imaging technique that is useful in the differential diagnosis of thyroid cancer. Utilization of ultrasound elastography could reduce the rate of thyroid biopsies because of its high elasticity being highly associated with benign cytology.

Perithyroidal hemorrhage caused by hydrodissection during radiofrequency ablation for benign thyroid nodules:Two case reports

BACKGROUND Hydrodissection is a widely used technique during radiofrequency ablation(RFA)for benign thyroid nodules.Although it could effectively avoid thermal injury to the surrounding critical structures and achieve complete treatment,routine operation of the remaining needle could cause perithyroidal hemorrhage.In this report,we present 2 cases of perithyroidal hemorrhage during RFA caused by a hydrodissection needle,which have not been reported before.CASE SUMMARY A 21-year-old female and a 45-year-old male were admitted for RFA for benign thyroid nodules.Considering that their nodules were adjacent to the recurrent laryngeal nerve,the needle used for hydrodissection was placed and remained between the dorsal capsule of the lateral lobe and the recurrent laryngeal nerve.During the procedure,active bleeding near the needle appeared on ultrasonography(US).Although moderate pressure was quickly applied to the neck for several minutes,contrast-enhanced US(CEUS)still showed an active hemorrhage.A radiofrequency electrode was placed at the bleeding point under the guidance of CEUS to stop the bleeding,and the procedure was finally confirmed to be successful by CEUS,without other complications.CONCLUSION Hydrodissection during RFA of benign thyroid nodules was associated with a risk of perithyroidal hemorrhage.The timely recognition of this acute hemorrhage could help in the timely control of the bleeding,and CEUS-guided ablation of the bleeding point could be useful.

Diagnostic Value of Dual-Energy CT in Differentiating Malignant and Benign Thyroid Nodules: A Systematic Review and Meta-Analysis

Objectives: To evaluate the diagnostic performance of the quantitative iodine parameters, including Iodine Concentration (IC), Normalized Iodine Concentration (NIC), and λHU, in distinguishing malignant and benign thyroid nodules. Methods: Relevant studies were searched from Web of Science, PubMed, Embase, Cochrane Library, China National Knowledge Infrastructure database and other complementary sources from inception to May 20, 2020. Study selection, data extraction, quality assessment, and data analyses were performed following the Cochrane standards and the PRISMA-DTA guideline. Results: Eight studies were included (595 patients with 737 thyroid nodules). The pooled sensitivity, specificity and summary diagnostic odds ratio of IC were 79% (95% CI: 69% - 86%), 76% (95% CI: 65% - 84%) and 11 (95% CI: 5 - 27) respectively;those of NIC were 78% (95% CI: 70% - 85%), 80% (95% CI: 74% - 85%) and 15 (95% CI: 9 - 24) respectively;those of λHU were 80% (95% CI: 71% - 87%), 77% (95% CI: 70% - 83%) and 14 (95% CI: 8 - 24) respectively. Conclusion: DECT can be a potential evaluation tool for thyroid nodules. The NIC may be the most sensitive iodine parameter and could be comparable between different DECT machines in thyroid nodule assessment.

The Diagnostic Value of Color Doppler Ultrasound and Grey Scale Sonography in Predicting the Malignancy of Thyroid Nodules

Retrospective study was done at KAUH to determine the sonographic characteristics in predicting the malignancy of thyroid nodules. The sample was 120 patients consisting of 70 benign nodules and 50 malignant nodules. Out of 120 patients, 106 (88.3%) female and 14 (11.7%) male patients. Out of 106 female patients, 64 (91.45) had benign and 42 had malignant thyroid nodules. Out of 14 (11.7) male patients, 6 had benign and 8 had malignant thyroid nodules. The youngest patient in our study was 31 years and the oldest patient was 76 years. The common range of patients age was ≥ 60 years and consisting of twenty (28.6%) benign thyroid nodules and fourteen (28%) malignant thyroid nodules. The majority of patients’ age group with malignant thyroid nodules were between 50 - 60 years and consisting of twenty (40%) malignant nodules. In our study, according to the result of gray scale and color Doppler ultrasonography, hypo-echogenicity, solid echo structure, micro-calcification and intra-nodular vascularity were the significant characteristics of malignancy in nodules with sensitivity (72%, 74%, 48% and 88% respectively), specificity (66%, 63%, 94% and 69% respectively), PPV (60%, 59%, 86% and 67% respectively) and NPV (77%, 77%, 72% and 89% respectively).

The Reliability of Ultrasound Diagnosis in Differentiating Malignant from Benign Thyroid Nodules Using TI-RADS Selection Followed by FNA

Context: Diagnostic imaging has increased the rate of thyroid nodules detection and improved utilization of fine-needle aspiration (FNA). Objective: This study aims to demonstrate the effects of the most reliable non-invasive technique on thyroid nodules. Methods: Between 2016 and 2020, 190 patients with 214 nodules visiting King Khalid University Hospital were randomly selected and retrospectively reviewed. Following the ACR TI-RADS recommendations for FNA and correlating cytology reports. Two expert radiologists with ultrasonographic imaging experience re-evaluated and reviewed the images. 88 nodules (41%) in 79 patients were excluded because the nodule size was smaller than the FNA recommended size. Results: Following the ACR TI-RADS for FNA recommended selection, 27 nodules (21.4%) out of the recommended 126 nodules were consistent with malignancy in cytology, with overall mean sensitivities, specificities, accuracies, precisions, and negative predictive values (NPV) of 96.4%, 40.7%, 48.7%, 28.4%, and 98.6% respectively. The nodules were subdivided into the TI-RADS 3, 4, and 5. Conclusion: In conclusion, ACR TI-RADS is feasible, reliable, and well structured, easily applicable in thyroid nodules reporting. ACR TI-RADS can eliminate many unnecessary FNAs, providing a decline in costs and complications. We recommend the ACR TI-RADS in our radiology department to eliminate reporting discrepancies and cut costs, thereby standardizing the reports, improving intra-user agreements, and improving overall patients’ health care.

Assessment of Malignancy Risk in Thyroid Nodules Using a Practical Ultrasound Predictor Model: “Alpha Score”

Objective: The aim of this study was to develop a simple predictor model to diagnose malignancy by using ultrasound features of thyroid nodules and the association with cytopathological diagnosis obtained by fine needle aspiration. Materials and Methods: The likelihood of malignancy from ultrasound features was assessed in thyroid nodules obtained by fine-needle aspiration biopsy (FNAB) according to cytopathological findings reported using Bethesda System. A score was developed depending on the presence of each ultrasound feature evaluated. Results: 429 nodules were assessed, 103 (24%) were malignant. The following ultrasound features were associated with malignancy, according to the logistic regression analysis and were assigned a score of 0, +1, +2 depending on the presence or absence of each one: hypoechogenicity, solid appearance, irregular margins, microcalcifications, absence of a halo, diameter of &ge;10 mm and intranodular vascular flow. The area under the curve of the proposed model was 0.900, demonstrating its predictive capacity. 4 risk categories were stablished based on the score obtained. Malignant nodules scored higher than the benign nodules (7.24 &plusmn;1.87 vs. 3.74 &plusmn;1.83). Conclusions: The proposed predictive model demonstrated to be useful and easy to apply when stratifying thyroid nodule risk of malignancy using presented US features and applying the proposed risk categories to increase the accuracy at selecting nodules that need to be studied with FNA.

Reliability of Thyroid Imaging Reporting and Data System(TIRADS)Classification in Differentiating Benign from Malignant Thyroid Nodules

Background: Ultrasonography (US) is the best diagnostic tool in the initial assessment of thyroid nodule. Giving its appropriateness and accessibility, ultrasound-based thyroid imaging reporting and data systems (TIRADS) classifications have been developed with main goal to standardize reporting and facilitate communication between practitioners, and to indicate when fine-needle aspiration biopsy (FNAB) should be performed. Objective: To determine the reliability of Russ’ modified TIRADS classification in predicting thyroid malignancy. Materials and Methods: It was a cross sectional study carried out at Centre Hospitalier de Lagny, Marne La Vallée (France). Consecutive records of patients with focal thyroid nodules on ultrasound (US) for which US-guided FNAB was performed and pathology results were available, from January 2007 to August 2012, were selected for review. The risk of malignancy of each TIRADS category was determined and correlation with pathology assessed. Statistical performances of some US features were also assessed. The threshold for statistical significance was set at 0.05. Results: A total of 430 records of patients were eligible. Twenty-three out of 430 (5.3%) nodules were malignant. The risk of malignancy of the TIRADS categories were as follows: TIRADS2 0%, TIRADS3 2.2%, TIRADS4A 5.9%, TIRADS4B 57.9%, TIRADS5 100% (Gamma statistic = 0.85;Spearman correlation = 0.30, Pearson’s R = 0.37, p Conclusion: Russ’ modified TIRADS classification is reliable in predicting thyroid malignancy. More evidence is nevertheless necessary for widespread adoption and use.

Differential value of shear wave velocity(SWV)in nodules quantitatively determined by ARFI for benign and malignant thyroid nodules

Objective: To study the differential value of shear wave velocity (SWV) in nodules quantitatively determined by acoustic radiation force impulse (ARFI) for benign and malignant thyroid nodules. Methods: Patients who were diagnosed with thyroid nodules in the People's Hospital of Hai'an County between June 2014 and February 2017 were selected and divided into those with benign thyroid nodules and malignant thyroid nodules according to the biopsy results. Before biopsy, the ARFI ultrasonic elastography was performed to measure SWV, and the biopsy tissue was collected after biopsy to determine the expression of proliferation molecules and invasion molecules. Results: The SWV of malignant thyroid nodules was significantly higher than that of benign thyroid nodules;P53, CyclinG2, E-cadherin, TIMP1 and TIMP3 mRNA expression in malignant thyroid nodules were significantly lower than those in benign thyroid nodules while FOXA1, Survivin, XIAP, Twist and Vimentin mRNA expression were significantly higher than those in benign thyroid nodules;P53, CyclinG2, E-cadherin, TIMP1 and TIMP3 mRNA expression in malignant thyroid nodules with high SWV were significantly lower than those in malignant thyroid nodules with low SWV while FOXA1, Survivin, XIAP, Twist and Vimentin mRNA expression were significantly higher than those in malignant thyroid nodules with low SWV. Conclusion: The SWV of malignant thyroid nodules significantly increases and is closely related to the abnormal proliferation and invasion of cancer cells.