1.Concurrent Association of Multifocality, Bilaterality, and Recurrence in Pediatric Papillary Thyroid Cancer Patients
Jae Won CHO ; Cheong-Sil RAH ; Won Woong KIM ; Yu-mi LEE ; Seong Chul KIM ; Jung Hwan BAEK ; Dong Eun SONG ; Won Gu KIM ; Ki-Wook CHUNG ; Suck Joon HONG ; Tae-Yon SUNG
Yonsei Medical Journal 2025;66(1):43-50
		                        		
		                        			 Purpose:
		                        			Pediatric papillary thyroid cancer (PTC) is recommended to perform aggressive surgery to reduce the risk of recurrence.This study was designed to evaluate the concurrent association between multifocality, bilaterality, and the risk of recurrence in pediatric PTC. 
		                        		
		                        			Materials and Methods:
		                        			This retrospective cohort study included pediatric patients (age <19 years) who underwent total thyroidectomy for PTC between 1996 and 2014 in a single tertiary center. Clinicopathological parameters were analyzed to evaluate the prevalence of multifocality, bilaterality, recurrence, and their association. 
		                        		
		                        			Results:
		                        			We analyzed 58 pediatric patients with PTC. There was no factor related to the presence of multifocality or bilaterality in multivariate analysis. Also, in univariate analysis, multifocality and bilaterality were not independent risk factors of each other’s presentation (p=0.061 and p=0.061, respectively). Recurrence was observed in 19 (32.8%) patients. In multivariate analysis of recurrence, clear cell subtype, multifocality, and gross extrathyroidal extension (ETE) were independent risk factors (p=0.027, p=0.035, and p=0.038, respectively). Most recurrences (68.4%) happened during the first 4 years of follow-up after the initial thyroidectomy. 
		                        		
		                        			Conclusion
		                        			Multifocality and bilaterality were not independent risk factors of each other’s presentation; however, multifocality was the risk factor for recurrence in pediatric PTC. For pediatric PTC, close monitoring for recurrence within the initial 4 years is recommended, particularly in patients with clear cell subtype, multifocality, and gross ETE. 
		                        		
		                        		
		                        		
		                        	
2.Concurrent Association of Multifocality, Bilaterality, and Recurrence in Pediatric Papillary Thyroid Cancer Patients
Jae Won CHO ; Cheong-Sil RAH ; Won Woong KIM ; Yu-mi LEE ; Seong Chul KIM ; Jung Hwan BAEK ; Dong Eun SONG ; Won Gu KIM ; Ki-Wook CHUNG ; Suck Joon HONG ; Tae-Yon SUNG
Yonsei Medical Journal 2025;66(1):43-50
		                        		
		                        			 Purpose:
		                        			Pediatric papillary thyroid cancer (PTC) is recommended to perform aggressive surgery to reduce the risk of recurrence.This study was designed to evaluate the concurrent association between multifocality, bilaterality, and the risk of recurrence in pediatric PTC. 
		                        		
		                        			Materials and Methods:
		                        			This retrospective cohort study included pediatric patients (age <19 years) who underwent total thyroidectomy for PTC between 1996 and 2014 in a single tertiary center. Clinicopathological parameters were analyzed to evaluate the prevalence of multifocality, bilaterality, recurrence, and their association. 
		                        		
		                        			Results:
		                        			We analyzed 58 pediatric patients with PTC. There was no factor related to the presence of multifocality or bilaterality in multivariate analysis. Also, in univariate analysis, multifocality and bilaterality were not independent risk factors of each other’s presentation (p=0.061 and p=0.061, respectively). Recurrence was observed in 19 (32.8%) patients. In multivariate analysis of recurrence, clear cell subtype, multifocality, and gross extrathyroidal extension (ETE) were independent risk factors (p=0.027, p=0.035, and p=0.038, respectively). Most recurrences (68.4%) happened during the first 4 years of follow-up after the initial thyroidectomy. 
		                        		
		                        			Conclusion
		                        			Multifocality and bilaterality were not independent risk factors of each other’s presentation; however, multifocality was the risk factor for recurrence in pediatric PTC. For pediatric PTC, close monitoring for recurrence within the initial 4 years is recommended, particularly in patients with clear cell subtype, multifocality, and gross ETE. 
		                        		
		                        		
		                        		
		                        	
3.Concurrent Association of Multifocality, Bilaterality, and Recurrence in Pediatric Papillary Thyroid Cancer Patients
Jae Won CHO ; Cheong-Sil RAH ; Won Woong KIM ; Yu-mi LEE ; Seong Chul KIM ; Jung Hwan BAEK ; Dong Eun SONG ; Won Gu KIM ; Ki-Wook CHUNG ; Suck Joon HONG ; Tae-Yon SUNG
Yonsei Medical Journal 2025;66(1):43-50
		                        		
		                        			 Purpose:
		                        			Pediatric papillary thyroid cancer (PTC) is recommended to perform aggressive surgery to reduce the risk of recurrence.This study was designed to evaluate the concurrent association between multifocality, bilaterality, and the risk of recurrence in pediatric PTC. 
		                        		
		                        			Materials and Methods:
		                        			This retrospective cohort study included pediatric patients (age <19 years) who underwent total thyroidectomy for PTC between 1996 and 2014 in a single tertiary center. Clinicopathological parameters were analyzed to evaluate the prevalence of multifocality, bilaterality, recurrence, and their association. 
		                        		
		                        			Results:
		                        			We analyzed 58 pediatric patients with PTC. There was no factor related to the presence of multifocality or bilaterality in multivariate analysis. Also, in univariate analysis, multifocality and bilaterality were not independent risk factors of each other’s presentation (p=0.061 and p=0.061, respectively). Recurrence was observed in 19 (32.8%) patients. In multivariate analysis of recurrence, clear cell subtype, multifocality, and gross extrathyroidal extension (ETE) were independent risk factors (p=0.027, p=0.035, and p=0.038, respectively). Most recurrences (68.4%) happened during the first 4 years of follow-up after the initial thyroidectomy. 
		                        		
		                        			Conclusion
		                        			Multifocality and bilaterality were not independent risk factors of each other’s presentation; however, multifocality was the risk factor for recurrence in pediatric PTC. For pediatric PTC, close monitoring for recurrence within the initial 4 years is recommended, particularly in patients with clear cell subtype, multifocality, and gross ETE. 
		                        		
		                        		
		                        		
		                        	
4.Concurrent Association of Multifocality, Bilaterality, and Recurrence in Pediatric Papillary Thyroid Cancer Patients
Jae Won CHO ; Cheong-Sil RAH ; Won Woong KIM ; Yu-mi LEE ; Seong Chul KIM ; Jung Hwan BAEK ; Dong Eun SONG ; Won Gu KIM ; Ki-Wook CHUNG ; Suck Joon HONG ; Tae-Yon SUNG
Yonsei Medical Journal 2025;66(1):43-50
		                        		
		                        			 Purpose:
		                        			Pediatric papillary thyroid cancer (PTC) is recommended to perform aggressive surgery to reduce the risk of recurrence.This study was designed to evaluate the concurrent association between multifocality, bilaterality, and the risk of recurrence in pediatric PTC. 
		                        		
		                        			Materials and Methods:
		                        			This retrospective cohort study included pediatric patients (age <19 years) who underwent total thyroidectomy for PTC between 1996 and 2014 in a single tertiary center. Clinicopathological parameters were analyzed to evaluate the prevalence of multifocality, bilaterality, recurrence, and their association. 
		                        		
		                        			Results:
		                        			We analyzed 58 pediatric patients with PTC. There was no factor related to the presence of multifocality or bilaterality in multivariate analysis. Also, in univariate analysis, multifocality and bilaterality were not independent risk factors of each other’s presentation (p=0.061 and p=0.061, respectively). Recurrence was observed in 19 (32.8%) patients. In multivariate analysis of recurrence, clear cell subtype, multifocality, and gross extrathyroidal extension (ETE) were independent risk factors (p=0.027, p=0.035, and p=0.038, respectively). Most recurrences (68.4%) happened during the first 4 years of follow-up after the initial thyroidectomy. 
		                        		
		                        			Conclusion
		                        			Multifocality and bilaterality were not independent risk factors of each other’s presentation; however, multifocality was the risk factor for recurrence in pediatric PTC. For pediatric PTC, close monitoring for recurrence within the initial 4 years is recommended, particularly in patients with clear cell subtype, multifocality, and gross ETE. 
		                        		
		                        		
		                        		
		                        	
5.Concurrent Association of Multifocality, Bilaterality, and Recurrence in Pediatric Papillary Thyroid Cancer Patients
Jae Won CHO ; Cheong-Sil RAH ; Won Woong KIM ; Yu-mi LEE ; Seong Chul KIM ; Jung Hwan BAEK ; Dong Eun SONG ; Won Gu KIM ; Ki-Wook CHUNG ; Suck Joon HONG ; Tae-Yon SUNG
Yonsei Medical Journal 2025;66(1):43-50
		                        		
		                        			 Purpose:
		                        			Pediatric papillary thyroid cancer (PTC) is recommended to perform aggressive surgery to reduce the risk of recurrence.This study was designed to evaluate the concurrent association between multifocality, bilaterality, and the risk of recurrence in pediatric PTC. 
		                        		
		                        			Materials and Methods:
		                        			This retrospective cohort study included pediatric patients (age <19 years) who underwent total thyroidectomy for PTC between 1996 and 2014 in a single tertiary center. Clinicopathological parameters were analyzed to evaluate the prevalence of multifocality, bilaterality, recurrence, and their association. 
		                        		
		                        			Results:
		                        			We analyzed 58 pediatric patients with PTC. There was no factor related to the presence of multifocality or bilaterality in multivariate analysis. Also, in univariate analysis, multifocality and bilaterality were not independent risk factors of each other’s presentation (p=0.061 and p=0.061, respectively). Recurrence was observed in 19 (32.8%) patients. In multivariate analysis of recurrence, clear cell subtype, multifocality, and gross extrathyroidal extension (ETE) were independent risk factors (p=0.027, p=0.035, and p=0.038, respectively). Most recurrences (68.4%) happened during the first 4 years of follow-up after the initial thyroidectomy. 
		                        		
		                        			Conclusion
		                        			Multifocality and bilaterality were not independent risk factors of each other’s presentation; however, multifocality was the risk factor for recurrence in pediatric PTC. For pediatric PTC, close monitoring for recurrence within the initial 4 years is recommended, particularly in patients with clear cell subtype, multifocality, and gross ETE. 
		                        		
		                        		
		                        		
		                        	
6.Clinical Outcomes After Drug-Coated Balloon Treatment in Popliteal Artery Disease: K-POP Registry 12-Month Results
Jong-Il PARK ; Young-Guk KO ; Seung-Jun LEE ; Chul-Min AHN ; Seung-Woon RHA ; Cheol-Woong YU ; Jong Kwan PARK ; Sang-Ho PARK ; Jae-Hwan LEE ; Su-Hong KIM ; Yong-Joon LEE ; Sung-Jin HONG ; Jung-Sun KIM ; Byeong-Keuk KIM ; Myeong-Ki HONG ; Donghoon CHOI
Korean Circulation Journal 2024;54(8):454-465
		                        		
		                        			 Background and Objectives:
		                        			The popliteal artery is generally regarded as a “no-stent zone.”Limited data are available on the outcomes of drug-coated balloons (DCBs) for popliteal artery disease. This study aimed to evaluate the 12-month clinical outcomes among patients who received DCB treatment for atherosclerotic popliteal artery disease. 
		                        		
		                        			Methods:
		                        			This prospective, multicenter registry study enrolled 100 patients from 7 Korean endovascular centers who underwent endovascular therapy using IN.PACT DCB (Medtronic) for symptomatic atherosclerotic popliteal artery disease. The primary endpoint was 12-month clinical primary patency and the secondary endpoint was clinically driven target lesion revascularization (TLR)–free rate. 
		                        		
		                        			Results:
		                        			The mean age of the study cohort was 65.7±10.8 years, and 77% of enrolled patients were men. The mean lesion length was 93.7±53.7 mm, and total occlusions were present in 45% of patients. Technical success was achieved in all patients. Combined atherectomy was performed in 17% and provisional stenting was required in 11%. Out of the enrolled patients, 91 patients completed the 12-month follow-up. Clinical primary patency and TLR-free survival rates at 12 months were 76.0% and 87.2%, respectively. A multivariate Cox regression analysis identified female and longer lesion length as the significant independent predictors of loss of patency. 
		                        		
		                        			Conclusions
		                        			DCB treatment yielded favorable 12-month clinical primary patency and TLRfree survival outcomes in patients with popliteal artery disease. 
		                        		
		                        		
		                        		
		                        	
7.Comparison of Statin With Ezetimibe Combination Therapy Versus Statin Monotherapy for Primary Prevention in Middle-Aged Adults
Jung-Joon CHA ; Soon Jun HONG ; Subin LIM ; Ju Hyeon KIM ; Hyung Joon JOO ; Jae Hyoung PARK ; Cheol Woong YU ; Do-Sun LIM ; Jang Young KIM ; Jin-Ok JEONG ; Jeong-Hun SHIN ; Chi Young SHIM ; Jong-Young LEE ; Young-Hyo LIM ; Sung Ha PARK ; Eun Joo CHO ; Hasung KIM ; Jungkuk LEE ; Ki-Chul SUNG ;
Korean Circulation Journal 2024;54(9):534-544
		                        		
		                        			 Background and Objectives:
		                        			Lipid lowering therapy is essential to reduce the risk of major cardiovascular events; however, limited evidence exists regarding the use of statin with ezetimibe as primary prevention strategy for middle-aged adults. We aimed to investigate the impact of single pill combination therapy on clinical outcomes in relatively healthy middleaged patients when compared with statin monotherapy. 
		                        		
		                        			Methods:
		                        			Using the Korean National Health Insurance Service database, a propensity score match analysis was performed for baseline characteristics of 92,156 patients categorized into combination therapy (n=46,078) and statin monotherapy (n=46,078) groups. Primary outcome was composite outcomes, including death, coronary artery disease, and ischemic stroke. And secondary outcome was all-cause death. The mean follow-up duration was 2.9±0.3 years. 
		                        		
		                        			Results:
		                        			The 3-year composite outcomes of all-cause death, coronary artery disease, and ischemic stroke demonstrated no significant difference between the 2 groups (10.3% vs.10.1%; hazard ratio [HR], 1.022; 95% confidence interval [CI], 0.980–1.064; p=0.309).Meanwhile, the 3-year all-cause death rate was lower in the combination therapy group than in the statin monotherapy group (0.2% vs. 0.4%; p<0.001), with a significant HR of 0.595 (95% CI, 0.460–0.769; p<0.001). Single pill combination therapy exhibited consistently lower mortality rates across various subgroups. 
		                        		
		                        			Conclusions
		                        			Compared to the statin monotherapy, the combination therapy for primary prevention showed no difference in composite outcomes but may reduce mortality risk in relatively healthy middle-aged patients. However, since the study was observational, further randomized clinical trials are needed to confirm these findings. 
		                        		
		                        		
		                        		
		                        	
8.Compression neuropathy caused by a lipoma in the fourth finger: a case report
Hyeon Jun KIM ; Sung Yoon JUNG ; Ji Woong KIM
Archives of hand and microsurgery 2024;29(4):243-247
		                        		
		                        			
		                        			 Lipomas are benign tumors originating from adipocytes, and less than 1% of lipomas occur in the fingers. While most lipomas can be managed with observation, those occurring in the fingers can cause symptoms and functional impairment due to the proximity of the subcutaneous fat layer to nerves and blood vessels. Herein, the authors report a case of a patient who experienced finger numbness due to a lipoma extending from the fourth proximal phalanx to the middle phalanx. In cases like this, where initial symptoms are present in the finger but the mass is not palpable, it is essential to actively pursue a diagnosis using ultrasonography or magnetic resonance imaging. Also, in cases of lipomas causing symptoms and functional impairment, early removal may be beneficial for alleviating the patient's symptoms. 
		                        		
		                        		
		                        		
		                        	
9.Clinical Outcomes After Drug-Coated Balloon Treatment in Popliteal Artery Disease: K-POP Registry 12-Month Results
Jong-Il PARK ; Young-Guk KO ; Seung-Jun LEE ; Chul-Min AHN ; Seung-Woon RHA ; Cheol-Woong YU ; Jong Kwan PARK ; Sang-Ho PARK ; Jae-Hwan LEE ; Su-Hong KIM ; Yong-Joon LEE ; Sung-Jin HONG ; Jung-Sun KIM ; Byeong-Keuk KIM ; Myeong-Ki HONG ; Donghoon CHOI
Korean Circulation Journal 2024;54(8):454-465
		                        		
		                        			 Background and Objectives:
		                        			The popliteal artery is generally regarded as a “no-stent zone.”Limited data are available on the outcomes of drug-coated balloons (DCBs) for popliteal artery disease. This study aimed to evaluate the 12-month clinical outcomes among patients who received DCB treatment for atherosclerotic popliteal artery disease. 
		                        		
		                        			Methods:
		                        			This prospective, multicenter registry study enrolled 100 patients from 7 Korean endovascular centers who underwent endovascular therapy using IN.PACT DCB (Medtronic) for symptomatic atherosclerotic popliteal artery disease. The primary endpoint was 12-month clinical primary patency and the secondary endpoint was clinically driven target lesion revascularization (TLR)–free rate. 
		                        		
		                        			Results:
		                        			The mean age of the study cohort was 65.7±10.8 years, and 77% of enrolled patients were men. The mean lesion length was 93.7±53.7 mm, and total occlusions were present in 45% of patients. Technical success was achieved in all patients. Combined atherectomy was performed in 17% and provisional stenting was required in 11%. Out of the enrolled patients, 91 patients completed the 12-month follow-up. Clinical primary patency and TLR-free survival rates at 12 months were 76.0% and 87.2%, respectively. A multivariate Cox regression analysis identified female and longer lesion length as the significant independent predictors of loss of patency. 
		                        		
		                        			Conclusions
		                        			DCB treatment yielded favorable 12-month clinical primary patency and TLRfree survival outcomes in patients with popliteal artery disease. 
		                        		
		                        		
		                        		
		                        	
10.Comparison of Statin With Ezetimibe Combination Therapy Versus Statin Monotherapy for Primary Prevention in Middle-Aged Adults
Jung-Joon CHA ; Soon Jun HONG ; Subin LIM ; Ju Hyeon KIM ; Hyung Joon JOO ; Jae Hyoung PARK ; Cheol Woong YU ; Do-Sun LIM ; Jang Young KIM ; Jin-Ok JEONG ; Jeong-Hun SHIN ; Chi Young SHIM ; Jong-Young LEE ; Young-Hyo LIM ; Sung Ha PARK ; Eun Joo CHO ; Hasung KIM ; Jungkuk LEE ; Ki-Chul SUNG ;
Korean Circulation Journal 2024;54(9):534-544
		                        		
		                        			 Background and Objectives:
		                        			Lipid lowering therapy is essential to reduce the risk of major cardiovascular events; however, limited evidence exists regarding the use of statin with ezetimibe as primary prevention strategy for middle-aged adults. We aimed to investigate the impact of single pill combination therapy on clinical outcomes in relatively healthy middleaged patients when compared with statin monotherapy. 
		                        		
		                        			Methods:
		                        			Using the Korean National Health Insurance Service database, a propensity score match analysis was performed for baseline characteristics of 92,156 patients categorized into combination therapy (n=46,078) and statin monotherapy (n=46,078) groups. Primary outcome was composite outcomes, including death, coronary artery disease, and ischemic stroke. And secondary outcome was all-cause death. The mean follow-up duration was 2.9±0.3 years. 
		                        		
		                        			Results:
		                        			The 3-year composite outcomes of all-cause death, coronary artery disease, and ischemic stroke demonstrated no significant difference between the 2 groups (10.3% vs.10.1%; hazard ratio [HR], 1.022; 95% confidence interval [CI], 0.980–1.064; p=0.309).Meanwhile, the 3-year all-cause death rate was lower in the combination therapy group than in the statin monotherapy group (0.2% vs. 0.4%; p<0.001), with a significant HR of 0.595 (95% CI, 0.460–0.769; p<0.001). Single pill combination therapy exhibited consistently lower mortality rates across various subgroups. 
		                        		
		                        			Conclusions
		                        			Compared to the statin monotherapy, the combination therapy for primary prevention showed no difference in composite outcomes but may reduce mortality risk in relatively healthy middle-aged patients. However, since the study was observational, further randomized clinical trials are needed to confirm these findings. 
		                        		
		                        		
		                        		
		                        	
            
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