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Su Kyoung Kwon 4 Articles
Diagnostic value of BRAFV600E mutation analysis in fine needle aspiration for evaluation of thyroid nodules
Hae Won Lee, So Young Ock, Bu Kyoung Kim, Su Kyoung Kwon, Young Sik Choi, Jeong Hoon Kim, Sang Bong Jung
Kosin Med J. 2018;33(1):1-11.   Published online January 21, 2018
DOI: https://doi.org/10.7180/kmj.2018.33.1.1
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Abstract PDFPubReader   CrossRef-TDMCrossref - TDM
Objectives

Ultrasound-guided fine-needle aspiration (FNA) is routinely used in the evaluation of thyroid nodules. However, it has several pitfalls, as has been noted in nondiagnostic and indeterminate cases. This study aims to investigate the value of BRAFV600E mutation co-testing in FNA cytology.

Method

A total of 310 patients underwent BRAFV600E mutation co-testing in FNA cytology on thyroid nodules between June 2013 and June 2014. Of the 310 patients, 69 patients who had undergone a surgery for thyroid nodules were included in this study. The presence of the BRAFV600E mutation was determined by allele-specific polymerase chain reaction amplification of exon 15 of the BRAF gene.

Results

Of 69 cases, 33 (47.8%) were BRAFV600E mutation positive. The BRAFV600E mutation was not significantly associated with high-risk features such as tumor size, lymph node metastasis, and pathological stage. The respective diagnostic performance of FNA (P = 0.02), BRAFV600E mutation (P = 0.03), and ultrasonographic (P = 0.00) findings was statistically significant. The sensitivity, specificity and positive predictive value of FNA was 64.9%, 83.3%, and 94.8%. The sensitivity, specificity and positive predictive value of BRAFV600E mutation was 56.1%, 91.7%, and 96.9% and the US features was 91.2%, 91.7%, and 98.1% respectively. However, sensitivity of FNA with BRAFV600E mutation (77.2%) was lower than FNA with US (92.9%) and combination all together (92.9%).

Conclusion

In this study, we found that US features were the most useful in preoperative differential diagnosis of thyroid nodules. BRAFV600E mutation co-testing in FNA cytology was also useful for diagnosis of thyroid tumors.

Are there differences in hepatitis-B immunization status between diabetes and non-diabetes subjects in Korea?
Ji Young Park, Su Kyoung Kwon
Kosin Med J. 2018;33(1):41-50.   Published online January 21, 2018
DOI: https://doi.org/10.7180/kmj.2018.33.1.41
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Abstract PDFPubReader   CrossRef-TDMCrossref - TDM
Objectives

The American Diabetes Association (ADA) recommends hepatitis-B virusVIruS vaccination for unvaccinated adults with diabetes. However, the Korean Diabetes Association (KDA) did not recommend hepatitis-B vaccination for unvaccinated adults with diabetes. This study was performed to assess the differences in hepatitis-B virus antigen and antibody status between Korean patients with diabetes and those without by using national survey data.

Methods

We analyzed hepatitis-B virus antigen and antibody status in 9,771 South Korean people from the general population based on the Korean National Health and Nutrition Examination Survey. Diabetes patients were defined as those with a measured fasting plasma glucose over 126 mg/dL or those who had been previously diagnosed with diabetes by other health care centers.

Results

Subjects with diabetes accounted for 812 (8.3%) among the 9771 study subjects. The prevalence ofhepatitis-B (HBsAg) seropositive subjects was not significantly different (3.9% vs. 4.6%, P = 0.09) between subjects with diabetes and those without. The prevalence of hepatitis-B antibody (HBsAb) positive subjects and unimmunized subjects was not significantly different (55.2% vs. 58.2%, P = 0.09, 40.9% vs. 37.2%, P = 0.09) between the two groups. The prevalence of unimmunized subjects decreased by age (< 20 years 33.3 % vs. 33.0%, 20~29 years 49.1% vs. 41.2%, 30~39 years 41.9% vs. 37.7%, 40~49 years 35.1% vs. 33.5%, 50~59 years 39.0% vs. 38.0%, 60~69 years 41.2% vs. 39.8%, > 70 years 48.5% vs. 42.8%) but was not significantly different between the 2 groups.

Conclusions

From this study, we conclude that there are not sufficient grounds to recommend routine hepatitis-B virus vaccination for unvaccinated Korean subjects with diabetes at this point in time in Korea. Further prospective studies will be needed.

Obesity and Insulin Resistance According to Age in Newly Diagnosed Type 2 Diabetes Patients in Korea
Ju Won Lee, Nam Kyu Kim, Hyun Joon Park, Jun Yeob Lee, Seon Yoon Choi, Eun Mi Lee, So Young Ock, Su Kyoung Kwon, Young Sik Choi, Bu Kyung Kim
Kosin Med J. 2016;31(2):157-166.   Published online January 20, 2016
DOI: https://doi.org/10.7180/kmj.2016.31.2.157
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Abstract PDFPubReader   ePub   CrossRef-TDMCrossref - TDM
Abstract Objectives

With the rapid increase in the prevalence of diabetes, the age groups of diabetic patients are becoming diversified. This study will examine the degree of obesity, insulin resistance, and insulin secretion ability among patients first diagnosed with diabetes according to age and gender.

Methods

The subjects of this study included 616 patients who were first diagnosed with diabetes during a routine physical examination. This sample was obtained from a total of 28,075 adults aged 19 years and older who received the examination among 33,829 participants in the Korea National Health & Nutrition Examination Survey (KNHANES) from 2007–2010. The subjects were categorized by age into young age (age: 19 – 39 years), middle age (age: 40 – 59 years), and old age (age: 60 years and older). The degree of obesity was categorized according to body mass index (BMI) into normal weight (BMI: 18.5 ∼ 22.9), overweight (BMI: 23 ∼ 24.9), and obesity (BMI: 25 or above). Insulin resistance was evaluated by homeostatic model assessment of insulin resistance (HOMA-IR).

Results

It was found that 14.1% (n = 87) of a total of 616 subjects (324 men, 292 women) were in the young age group, 43.8% (n = 270) were in the middle age group, and 42.1% (n = 259) were in the old age group. In addition, 83.3% of men that were overweight or obesity were in the young age group, while 79.2% and 60.5% were in the middle age and old age groups, respectively. A total of 82.2% of women that were overweight or obesity were in the young age group, while 79.5% and 77% were in the middle age and old age groups, respectively. For men, the more obesity they were in all age groups, the higher their HOMA-IR. For women, the more obesity they were in the young age and middle age groups, the higher their HOMA-IR; however, women in the old age group showed the highest HOMA-IR when they were of normal weight.

Conclusion

Among diabetic patients first diagnosed with the disease in Korea, the youth population had the highest obesity rate. Insulin resistance increases as an individual's weight increases among those patients who are first diagnosed with diabetes; the only exception noted is for elderly women.

Diagnostic Value of Preoperative Serum Thyroglobulin Measurement for the Diagnosis of Malignancy in Follicular or Hürthle Cell Neoplasms of the Thyroid Gland
Nam Kyu Kim, Seong Joo Kang, Weon Hyoung Lee, Go Eun Yeo, You Jin Han, Bu Kyung Kim, Su Kyoung Kwon, Yo-Han Park, Young Sik Choi
Kosin Med J. 2014;29(1):17-22.   Published online December 17, 2014
DOI: https://doi.org/10.7180/kmj.2014.29.1.17
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Abstract PDFPubReader   CrossRef-TDMCrossref - TDM
Abstract Objectives

The aim of this retrospective study was whether serum Tg predicts malignancy in follicular or Hürthle-cell neoplasms on fine needle aspiration.

Methods

A chart review of 111 patients (90 females, 21 males; mean age 46.8 ± 11.9 years) with follicular or Hürthle-cell neoplasms on fine needle aspiration, who were surgically treated between Sep. 2001 and Sep. 2011, was performed. Predictive factors for malignancy were identified by the chi-squared test and multivariate logistic regression.

Results

There were no differences between 41 malignant and 70 benign lesions in serum Tg or any of the normalized indexes. Receiver-operator characteristic analysis revealed no cutoff value. Lesions with serum Tg levels greater than 500 g/L had no significant difference. And also there were no independent predictors of malignancy by multivariate logistic regression.

Conclusions

In this study, the author found that serum Tg has poor accuracy for predicting malignancy in follicular or Hürthle cell neoplasms on fine needle aspiration.


KMJ : Kosin Medical Journal