1.A Comparative Analysis of Neurocognitive Function in Community- and Hospital-Based Patients With Schizophrenia
Seri MAENG ; Hee Seon KIM ; Tae Joo LEE ; Hoon Jung KOO ; Won-Hyoung KIM
Psychiatry Investigation 2024;21(10):1110-1119
		                        		
		                        			 Objective:
		                        			The study compared differences in various neurocognitive characteristics across treatment modalities among schizophrenia patients recruited in one city between July 2020 and June 2023 who were on regular medication. 
		                        		
		                        			Methods:
		                        			Of the 151 participants, 113 were included in the analysis. Participants were divided into community-based and hospital-based groups, and their demographics and clinical characteristics, including insight, quality of life, positive and negative symptoms, and personal and social functioning, were examined. In addition, several aspects of cognition were assessed using neurocognitive assessments such as the Trail Making Test (TMT), Stroop test, and Wisconsin Card Sorting Test (WCST). After adjusting for age differences between groups, the final analysis included data from 42 participants in the community-based group and 33 participants in the hospital-based group. 
		                        		
		                        			Results:
		                        			Hospital-based group participants completed Stroop-W more rapidly, excelled in Rey-Osterrieth Complex Figure Test recall and recognition, and incurred fewer TMT Part B (TMT-B) and Stroop-C errors. Additionally, they outperformed in WCST total, non-persistent errors, and categories completed. Contrastingly, community-based group participants showed superior outcomes in WCST persistent responses and errors, suggesting specific neurocognitive strengths. 
		                        		
		                        			Conclusion
		                        			We found differences in neurocognitive characteristics between the two groups. These differences were consistent across a range of cognitive domains, including attention, visual discrimination, memory, and executive functioning. Further large-scale study is needed to generalize cognitive characteristics across treatment modalities. 
		                        		
		                        		
		                        		
		                        	
2.Atypical Teratoid/Rhabdoid Tumor of the Central Nervous System in Children under the Age of 3 Years
Meerim PARK ; Jung Woo HAN ; Seung Min HAHN ; Jun Ah LEE ; Joo-Young KIM ; Sang Hoon SHIN ; Dong-Seok KIM ; Hong In YOON ; Kyung Taek HONG ; Jung Yoon CHOI ; Hyoung Jin KANG ; Hee Young SHIN ; Ji Hoon PHI ; Seung-Ki KIM ; Ji Won LEE ; Keon Hee YOO ; Ki Woong SUNG ; Hong Hoe KOO ; Do Hoon LIM ; Hyung Jin SHIN ; Hyery KIM ; Kyung-Nam KOH ; Ho Joon IM ; Seung Do AHN ; Young-Shin RA ; Hee-Jo BAEK ; Hoon KOOK ; Tae-Young JUNG ; Hyoung Soo CHOI ; Chae-Yong KIM ; Hyeon Jin PARK ; Chuhl Joo LYU
Cancer Research and Treatment 2021;53(2):378-388
		                        		
		                        			Purpose:
		                        			Atypical teratoid/rhabdoid tumor (ATRT) is a highly aggressive malignancy with peak incidence in children aged less than 3 years. Standard treatment for central nervous system ATRT in children under the age of 3 years have not been established yet. The objective of this study was to analyze characteristics and clinical outcomes of ATRT in children aged less than 3 years. 
		                        		
		                        			Materials and Methods:
		                        			A search of medical records from seven centers was performed between January 2005 and December 2016. 
		                        		
		                        			Results:
		                        			Forty-three patients were enrolled. With a median follow-up of 90 months, 27 patients (64.3%) showed at least one episode of disease progression (PD). The first date of PD was at 160 days after diagnosis. The 1- and 3-year progression-free survivals (PFS) were 51.2% and 28.5%, respectively. The 1- and 3-year overall survivals were 61.9% and 38.1%, respectively. The 3-year PFS was improved from 0% in pre-2011 to 47.4% in post-2011. Excluding one patient who did not receive any further therapy after surgery, 27 patients died due to PD (n=21), treatment-related toxicity (n=5), or unknown cause (n=1). In univariate analysis, factors associated with higher 3-year PFS were no metastases, diagnosis after 2011, early adjuvant radiotherapy, and high-dose chemotherapy (HDCT). In multivariate analysis, the use of HDCT and adjuvant radiotherapy remained significant prognostic factors for PFS (both p < 0.01). 
		                        		
		                        			Conclusion
		                        			Aggressive therapy including early adjuvant radiotherapy and HDCT could be considered to improve outcomes of ATRT in children under the age of 3 years.
		                        		
		                        		
		                        		
		                        	
3.National Academy of Medicine of Korea (NAMOK) Key Statements on COVID-19
Hyoung-Shik SHIN ; Hyesook PARK ; Jun Soo KWON ; Hyun NAMGOONG ; Seong-Jun KIM ; June Myung KIM ; Kyong Ran PECK ; Kyungwon LEE ; Jong-koo LEE ; JinHan LEE ; Hee Chul HAN ; SungJin HONG ; Byung-Joo PARK ; Tae Hwan LIM ; Eung Soo HWANG ; Jun Hee WOO ; NAMOK COVID-19 Committee
Journal of Korean Medical Science 2021;36(41):e287-
		                        		
		                        		
		                        		
		                        	
4.Atypical Teratoid/Rhabdoid Tumor of the Central Nervous System in Children under the Age of 3 Years
Meerim PARK ; Jung Woo HAN ; Seung Min HAHN ; Jun Ah LEE ; Joo-Young KIM ; Sang Hoon SHIN ; Dong-Seok KIM ; Hong In YOON ; Kyung Taek HONG ; Jung Yoon CHOI ; Hyoung Jin KANG ; Hee Young SHIN ; Ji Hoon PHI ; Seung-Ki KIM ; Ji Won LEE ; Keon Hee YOO ; Ki Woong SUNG ; Hong Hoe KOO ; Do Hoon LIM ; Hyung Jin SHIN ; Hyery KIM ; Kyung-Nam KOH ; Ho Joon IM ; Seung Do AHN ; Young-Shin RA ; Hee-Jo BAEK ; Hoon KOOK ; Tae-Young JUNG ; Hyoung Soo CHOI ; Chae-Yong KIM ; Hyeon Jin PARK ; Chuhl Joo LYU
Cancer Research and Treatment 2021;53(2):378-388
		                        		
		                        			Purpose:
		                        			Atypical teratoid/rhabdoid tumor (ATRT) is a highly aggressive malignancy with peak incidence in children aged less than 3 years. Standard treatment for central nervous system ATRT in children under the age of 3 years have not been established yet. The objective of this study was to analyze characteristics and clinical outcomes of ATRT in children aged less than 3 years. 
		                        		
		                        			Materials and Methods:
		                        			A search of medical records from seven centers was performed between January 2005 and December 2016. 
		                        		
		                        			Results:
		                        			Forty-three patients were enrolled. With a median follow-up of 90 months, 27 patients (64.3%) showed at least one episode of disease progression (PD). The first date of PD was at 160 days after diagnosis. The 1- and 3-year progression-free survivals (PFS) were 51.2% and 28.5%, respectively. The 1- and 3-year overall survivals were 61.9% and 38.1%, respectively. The 3-year PFS was improved from 0% in pre-2011 to 47.4% in post-2011. Excluding one patient who did not receive any further therapy after surgery, 27 patients died due to PD (n=21), treatment-related toxicity (n=5), or unknown cause (n=1). In univariate analysis, factors associated with higher 3-year PFS were no metastases, diagnosis after 2011, early adjuvant radiotherapy, and high-dose chemotherapy (HDCT). In multivariate analysis, the use of HDCT and adjuvant radiotherapy remained significant prognostic factors for PFS (both p < 0.01). 
		                        		
		                        			Conclusion
		                        			Aggressive therapy including early adjuvant radiotherapy and HDCT could be considered to improve outcomes of ATRT in children under the age of 3 years.
		                        		
		                        		
		                        		
		                        	
5.Efficacy of Pegylated Interferon Monotherapy versus Sequential Therapy of Entecavir and Pegylated Interferon in Hepatitis B e Antigen-Positive Hepatitis B Patients: A Randomized, Multicenter, Phase IIIb Open-Label Study (POTENT Study).
Dae Won JUN ; Sang Bong AHN ; Tae Yeob KIM ; Joo Hyun SOHN ; Sang Gyune KIM ; Se Whan LEE ; Byung Ho KIM ; Dong Joon KIM ; Ja Kyung KIM ; Hyoung Su KIM ; Seong Gyu HWANG ; Won Choong CHOI ; Won Young TAK ; Heon Ju LEE ; Ki Tae YOON ; Byung Cheol YUN ; Sung Wook LEE ; Soon Koo BAIK ; Seung Ha PARK ; Ji Won PARK ; Sol Ji PARK ; Ji Sung LEE
Chinese Medical Journal 2018;131(14):1645-1651
BackgroundUntil now, various types of combined therapy with nucleotide analogs and pegylated interferon (Peg-INF) in patients with hepatitis B patients have been tried. However, studies regarding the benefits of de novo combination, late-add on, and sequential treatment are very limited. The objective of the current study was to identify the efficacy of sequential treatment of Peg-INF after short-term antiviral treatment.
MethodsBetween June 2010 and June 2015, hepatitis B e antigen (HBeAg)-positive patients (n = 162) received Peg-IFN for 48 weeks (mono-treatment group, n = 81) and entecavir (ETV) for 12 weeks with a 48-week course of Peg-IFN starting at week 5 of ETV therapy (sequential treatment group, n = 81). The primary endpoint was HBeAg seroconversion at the end of follow-up period after the 24-week treatment. The primary endpoint was analyzed using Chi-square test, Fisher's exact test, and regression analysis.
ResultsHBeAg seroconversion rate (18.2% vs. 18.2%, t = 0.03, P = 1.000) and seroclearance rate (19.7% vs. 19.7%, t = 0.03, P = 1.000) were same in both mono-treatment and sequential treatment groups. The rate of alanine aminotransferase (ALT) normalization (45.5% vs. 54.5%, t = 1.12, P = 0.296) and serum hepatitis B virus (HBV)-DNA <2000 U/L (28.8% vs. 28.8%, t = 0.10, P = 1.000) was not different in sequential and mono-treatment groups at 24 weeks of Peg-INF. Viral response rate (HBeAg seroconversion and serum HBV-DNA <2000 U/L) was not different in the two groups (12.1% vs. 16.7%, t = 1.83, P = 0.457). Baseline HBV-DNA level (7 logU/ml vs. 7.5 logU/ml, t = 1.70, P = 0.019) and hepatitis B surface antigen titer (3.6 logU/ml vs. 4.0 logU/ml, t = 2.19, P = 0.020) were lower and predictors of responder in mono-treatment and sequential treatment groups, respectively.
ConclusionsThe current study shows no differences in HBeAg seroconversion rate, ALT normalization, and HBV-DNA levels between mono-therapy and sequential therapy regimens.
Trial RegistrationClinicalTrials.gov, NCT01220596; https://clinicaltrials.gov/ct2/show/NCT01220596?term=NCT01220596&rank=1.
6.Effects of a Temperature-Sensitive, Anti-Adhesive Agent on the Reduction of Adhesion in a Rabbit Laminectomy Model.
Jeong Woo PARK ; Koang Hum BAK ; Tae Koo CHO ; Hyoung Joon CHUN ; Je Il RYU
Journal of Korean Neurosurgical Society 2016;59(3):250-258
		                        		
		                        			
		                        			OBJECTIVE: A common cause of failure in laminectomy surgery is when epidural, peridural, or perineural adhesion occurs postoperatively. The purpose of this study is to examine the efficacy of a temperature-sensitive, anti-adhesive agent (TSAA agent), Guardix-SG®, as a mechanical barrier for the prevention or reduction of peridural scar adhesion in a rabbit laminectomy model. METHODS: Twenty-six mature rabbits were used for this study. Each rabbit underwent two separate laminectomies at lumbar vertebrae L3 and L6, left empty (the control group) and applied 2 mL of the TSAA agent (the experimental group), respectively. Invasive scar formation or inflammation after laminectomy was quantitatively evaluated by measuring the thickness of the dura, the distance from the surface of dura to the scar tissues, the number of inflammatory cells in the scar tissues at the laminectomy site, and the concentration of collagen in histological sections. RESULTS: At 6 weeks postsurgery, the dura was significantly thinner and the distance from the surface of dura to the scar tissues was greater in the experimental group than in the control group (p=0.04 and p=0.01). The number of inflammatory cells was not significantly different in the two groups (p=0.08), although the mean number of inflammatory cells was relatively lower in the experimental group than in the control group. CONCLUSION: The current study suggests that the TSAA agent, Guardix-SG®, could be useful as an interpositional physical barrier after laminectomy for the prevention or reduction of adhesion.
		                        		
		                        		
		                        		
		                        			Cicatrix
		                        			;
		                        		
		                        			Collagen
		                        			;
		                        		
		                        			Inflammation
		                        			;
		                        		
		                        			Laminectomy*
		                        			;
		                        		
		                        			Lumbar Vertebrae
		                        			;
		                        		
		                        			Rabbits
		                        			
		                        		
		                        	
7.Single Center Experiences of Conversion from Twice-daily Tacrolimus (Prograf) to Once-daily Tacrolimus (Advagraf) in Stable Liver Transplant Recipients.
Tae Seok KIM ; Keun Soo AHN ; Yong Hoon KIM ; Hyoung Tae KIM ; Koo Jeong KANG
The Journal of the Korean Society for Transplantation 2016;30(2):77-81
		                        		
		                        			
		                        			BACKGROUND: Patient adherence to immunosuppressant regimens after organ transplant is crucial to preserve graft function, and simplifying the regimen improves adherence. In this study, our experience of conversion from twice-daily (b.i.d.) to once-daily (q.d.) tacrolimus (TAC) in stable liver transplant recipients is reviewed and the proper conversion regimen is investigated. METHODS: Between November 2011 and August 2012, the regimen was converted in 32 stable liver transplant recipients, and data on the conversions gathered retrospectively from medical records. TAC trough level, dose, and laboratory findings were evaluated at preconversion and 1 to 12 months after conversion. RESULTS: Conversion from b.i.d. to q.d. regimen was based on 1:1 proportion in 16 patients and dose escalation in 16 patients. The mean conversion time after transplant was 56.8 months (range; 21~94). Reconversion to b.i.d. regimen was needed in nine patients. Among these patients, seven patients needed titration due to elevated liver enzyme. The trough level decreased significantly after conversion (from 4.7 to 3.1 ng/mL) in patients with conversion at 1:1 proportion, while increasing slightly without statistical significance (3.7 to 4.0 ng/mL) in patients with dose escalation. At 1 year after conversion, dose adjustment was required to preserve trough level and graft function in 14 patients. CONCLUSIONS: Based on our results, TAC q.d. formulation can be a useful option to improve adherence in stable liver transplant recipients. However, dose titration should be considered for preserving proper trough level in case of low TAC level or TAC single regimen.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Immunosuppression
		                        			;
		                        		
		                        			Liver*
		                        			;
		                        		
		                        			Medical Records
		                        			;
		                        		
		                        			Patient Compliance
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Tacrolimus*
		                        			;
		                        		
		                        			Transplant Recipients*
		                        			;
		                        		
		                        			Transplants
		                        			
		                        		
		                        	
8.A Case of Small Bowel Diffuse Large B-cell Lymphoma Mimicking Crohn's Disease.
Tae Hyoung KOO ; Won Jong CHOI ; Seung Hee HAN ; Su Young KIM ; Jong Hun LEE
The Korean Journal of Gastroenterology 2015;65(4):241-245
		                        		
		                        			
		                        			A 66-year-old male with dyspepsia and weight loss was referred to our hospital for evaluation. On laboratory examination, anti-saccharomyces cerevisiae (ASCA)-IgA was positive and iron deficiency anemia was present. PET/CT and abdominal CT scan images showed multiple small bowel segmental wall thickening and inflammation. Capsule endoscopy images showed multiple small bowel ulcerative lesions with exudates. Based on laboratory test results and imaging studies, the patient was diagnosed with Crohn's disease and treated with prednisolone and 5-aminosalicylic acid (5-ASA). However, the patient underwent second operation due to small bowel perforation within 2 month after initiation of treatment. Pathology report of the resected specimen was compatible to primary small bowel diffuse large B cell lymphoma and pertinent treatment was given to the patient after recovery. Herein, we describe a case of primary small bowel diffuse large B cell lymphoma that was mistaken for Crohn's disease.
		                        		
		                        		
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Antibodies/blood
		                        			;
		                        		
		                        			Antineoplastic Combined Chemotherapy Protocols/therapeutic use
		                        			;
		                        		
		                        			Capsule Endoscopy
		                        			;
		                        		
		                        			Crohn Disease/diagnosis/drug therapy
		                        			;
		                        		
		                        			Diagnostic Errors
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Immunoglobulin A/blood
		                        			;
		                        		
		                        			Intestinal Perforation/surgery
		                        			;
		                        		
		                        			Lymphoma, Large B-Cell, Diffuse/*diagnosis/drug therapy/pathology
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Mesalamine/therapeutic use
		                        			;
		                        		
		                        			Positron-Emission Tomography
		                        			;
		                        		
		                        			Saccharomyces cerevisiae/immunology
		                        			;
		                        		
		                        			Tomography, X-Ray Computed
		                        			
		                        		
		                        	
9.Improved severe hepatopulmonary syndrome after liver transplantation in an adolescent with end-stage liver disease secondary to biliary atresia.
Tae Jun PARK ; Keun Soo AHN ; Yong Hoon KIM ; Hyungseop KIM ; Ui Jun PARK ; Hyoung Tae KIM ; Won Hyun CHO ; Woo Hyun PARK ; Koo Jeong KANG
Clinical and Molecular Hepatology 2014;20(1):76-80
		                        		
		                        			
		                        			Hepatopulmonary syndrome (HPS) is a serious complication of end-stage liver disease, which is characterized by hypoxia, intrapulmonary vascular dilatation, and liver cirrhosis. Liver transplantation (LT) is the only curative treatment modality for patients with HPS. However, morbidity and mortality after LT, especially in cases of severe HPS, remain high. This case report describes a patient with typical findings of an extracardiac pulmonary arteriovenous shunt on contrast-enhanced transesophageal echocardiography (TEE), and clubbing fingers, who had complete correction of HPS by deceased donor LT. The patient was a 16-year-old female who was born with biliary atresia and underwent porto-enterostomy on the 55th day after birth. She had been suffered from progressive liver failure with dyspnea, clubbing fingers, and cyanosis. Preoperative arterial blood gas analysis revealed severe hypoxia (arterial O2 tension of 54.5 mmHg and O2 saturation of 84.2%). Contrast-enhanced TEE revealed an extracardiac right-to-left shunt, which suggested an intrapulmonary arteriovenous shunt. The patient recovered successfully after LT, not only with respect to physical parameters but also for pychosocial activity, including school performance, during the 30-month follow-up period.
		                        		
		                        		
		                        		
		                        			Adolescent
		                        			;
		                        		
		                        			Anoxia
		                        			;
		                        		
		                        			Arteriovenous Fistula/etiology
		                        			;
		                        		
		                        			Biliary Atresia/*diagnosis/etiology
		                        			;
		                        		
		                        			Cyanosis/complications
		                        			;
		                        		
		                        			Dyspnea/complications
		                        			;
		                        		
		                        			Echocardiography, Transesophageal
		                        			;
		                        		
		                        			End Stage Liver Disease/complications/*surgery
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Hepatic Artery/abnormalities
		                        			;
		                        		
		                        			Hepatopulmonary Syndrome/*diagnosis/ultrasonography
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			*Liver Transplantation
		                        			;
		                        		
		                        			Osteoarthropathy, Secondary Hypertrophic/complications
		                        			
		                        		
		                        	
10.Prognostic Value of Preoperative Positron Emission Tomography-Computed Tomography in Surgically Resected Gastric Cancer.
Ki Seung KIM ; Seok Reyol CHOI ; In Cheol PARK ; Tae Hyoung KOO ; Joon Mo KIM
The Korean Journal of Gastroenterology 2014;63(6):348-353
		                        		
		                        			
		                        			BACKGROUND/AIMS: The diagnostic value of PET-CT, in gastric cancer is well known, but the prognostic value of pretreatment PET-CT has not been adequately evaluated. This study aimed to investigate the preoperative prognostic value of PET-CT in gastric cancer patients. METHODS: A total of 107 patients underwent surgical treatment for gastric cancer from April 2007 to December 2010 at Dong-A University Medical Center after confirming the presence of F-18 fluorodeoxyglucose (FDG) uptake on preoperative PET-CT. Among these patients, the following subjects were excluded: follow-up loss (13), palliative resection (5), neoadjuvant chemotherapy (1), and unrelated death (1). The remaining 87 patients were included in this study and data were collected by retrospectively reviewing the medical records. The median follow-up duration, defined as the period from operation to last imaging study date, was 34.2+/-14.8 months. FDG uptake values were represented by maximal standardized uptake value (SUVmax). In order to assess the correlation between SUVmax and recurrence, Kaplan-Meier's survival analysis with log-rank test and cox proportional hazard model were performed. Receiver operating characteristic (ROC) curve was employed to determine the optimal cutoff value of SUVmax. RESULTS: The result of Kaplan-Meier's survival analysis with log-rank test were significantly different between high SUVmax group and low SUVmax group (p=0.035), the cutoff value of which was 5.6. However, in multivariate analysis with cox proportional hazard model, T-staging, N-staging and SUVmax did not show statistical significance (p=0.190, p=0.307, and p=0.436, respectively). CONCLUSIONS: High SUVmax on PET-CT in gastric cancer can be a useful prognostic factor.
		                        		
		                        		
		                        		
		                        			Adult
		                        			;
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Area Under Curve
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Fluorodeoxyglucose F18
		                        			;
		                        		
		                        			Follow-Up Studies
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Kaplan-Meier Estimate
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Middle Aged
		                        			;
		                        		
		                        			Neoplasm Grading
		                        			;
		                        		
		                        			Neoplasm Staging
		                        			;
		                        		
		                        			Positron-Emission Tomography
		                        			;
		                        		
		                        			Prognosis
		                        			;
		                        		
		                        			Proportional Hazards Models
		                        			;
		                        		
		                        			ROC Curve
		                        			;
		                        		
		                        			Radiopharmaceuticals
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Risk Factors
		                        			;
		                        		
		                        			Stomach Neoplasms/*diagnosis/mortality/surgery
		                        			;
		                        		
		                        			Tomography, X-Ray Computed
		                        			
		                        		
		                        	
            
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