Jong Young Choi

Prof. Dr. Jong Young Choi


Research Focus & Metrics

Academic Career Length

25Years (2002-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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3 September 2010 in BMC Cancer
Verified
Journal Article
Open access
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JKJung Hyun Kwon
Jung Hyun Kwon
SBSi Hyun Bae
Si Hyun Bae
JKJi Yoon Kim
Ji Yoon Kim
BCByung Ock Choi
Byung Ock Choi
HJHong Seok Jang
Hong Seok Jang
KCKyu Won Chung
Kyu Won Chung
Background: We evaluated the long-term effect of stereotactic body radiation therapy (SBRT) for primary small hepatocellular carcinoma (HCC) ineligible for local therapy or surgery. Methods: Forty-two HCC patients with tumors ≤ 100 cc and ineligible for local ablation therapy or surgical resection were treated with SBRT: 30-39 Gy with a prescription isodose range of 70-85% (median 80%) was delivered daily in three fractions. Median tumor volume was 15.4 cc (3.0-81.8) and median follow-up duration 28.7 months (8.4-49.1). Results: Complete response (CR) for the in-field lesion was initially achieved in 59.6% and partial response (PR) in 26.2% of patients. Hepatic out-of-field progression occurred in 18 patients (42.9%) and distant metastasis developed in 12 (28.6%) patients. Overall in-field CR and overall CR were achieved in 59.6% and 33.3%, respectively. Overall 1-year and 3-year survival rates were 92.9% and 58.6%, respectively. In-field progression-free survival at 1 and 3 years was 72.0% and 67.5%, respectively. Patients with smaller tumor had better in-field progression-free survival and overall survival rates (<32 cc vs. ≥32 cc, P < 0.05). No major toxicity was encountered but one patient died with extrahepatic metastasis and radiation-induced hepatic failure. Conclusions: SBRT is a promising noninvasive-treatment for small HCC that is ineligible for local treatment or surgical resection.

26 January 2006 in Hepatology
Verified
Journal Article
Open access
PDF file
JJJeong Won Jang
Jeong Won Jang
JCJong Young Choi
Jong Young Choi
SBSi Hyun Bae
Si Hyun Bae
SYSeung Kew Yoon
Seung Kew Yoon
ICIm U Chang
Im U Chang
YLYoung Sok Lee
Young Sok Lee
Reactivation of hepatitis B virus (HBV) during chemotherapy is well documented. However, there are limited data on this complication in patients with hepatocellular carcinoma (HCC) undergoing transarterial chemotherapy. The aim of this study was to evaluate the efficacy of preemptive lamivudine therapy in reducing hepatitis due to HBV reactivation in patients with HCC undergoing transarterial chemo-lipiodolization (TACL) and to seek predictors of this event. A total of 73 consecutive HCC patients undergoing TACL using epirubicin 50 mg/m2 and cisplatin 60 mg/m2 at monthly intervals were prospectively and randomly assigned to receive lamivudine 100 mg daily from the start of TACL (preemptive group) or not (control group). During the study, 11 (29.7%) of 37 patients in the control group and 1 (2.8%) of 36 patients in the preemptive group developed hepatitis due to HBV reactivation ( P = .002). In addition, there were significantly more incidences of overall hepatitis ( P = .021) and severe grade of hepatitis ( P = .035) in the control group. With multivariate Cox regression model, a baseline HBV DNA level of more than 104 copies/mL was the only independent predictor of hepatitis due to HBV reactivation during chemo-lipiodolization ( P = .046). In conclusion , preemptive lamivudine therapy demonstrated excellent efficacy in reducing hepatitis due to HBV reactivation and hepatic morbidity during TACL. Preemptive therapy should be considered in HCC patients with an HBV DNA level of more than 104 copies/mL. Further studies are needed to confirm the value of this approach in patients with low-level viremia. (Hepatology 2006;43:233–240.)

27 January 2015 in Hepatology
Verified
Journal Article
Open access
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JJJeong Won Jang
Jeong Won Jang
JCJong Young Choi
Jong Young Choi
YKYoung Seok Kim
Young Seok Kim
HWHyun Young Woo
Hyun Young Woo
SCSung Kyu Choi
Sung Kyu Choi
KHKwang‐Hyub Han
Kwang‐Hyub Han
The effect of viral suppression on long‐term disease outcome after decompensation in patients with hepatitis B virus (HBV)‐related cirrhosis has not been established. The aim of this study was to determine the long‐term effect of antiviral therapy (AVT) in patients with HBV‐related decompensated cirrhosis. This was a multicenter, prospective, inception cohort study of 707 patients who presented with first‐onset decompensated complications, including 284 untreated and 423 antiviral‐treated patients (58 previously treated, 253 with early treatment, and 112 with delayed treatment). The primary endpoint was 5‐year liver transplantation (LT)‐free survival. Secondary endpoints included virological response (VR) and serological response and improvement in liver function. Despite baseline high HBV activity and worse liver function, antiviral‐treated patients had significantly better transplant‐free survival than untreated patients (5‐year survival rates of 59.7% vs. 46.0%, respectively), with more apparent benefits from antivirals in Child‐Turcotte‐Pugh class B/C and high‐viremia groups. The rate of VR and hepatitis B e antigen seroconversion at 5 years in antiviral‐treated patients was 14.2% and 49.1%, respectively. A significant improvement in liver function was observed in treated versus untreated patients, with 33.9% of treated patients delisted for LT. Patients with early treatment had better clinical outcomes than those with delayed treatment. Survival was dependent on antiviral response, being significantly better in responders than in nonresponders or untreated cases. The initial benefit of AVT was negated over time in nonresponders. Antiviral treatment and maintained VR remained independently predictive of survival. The study results were corroborated by propensity score‐matching analysis. Conclusion: AVT significantly modifies the natural history of decompensated cirrhosis, improving liver function and increasing survival. The results underscore the importance of promptly administering potent antiviral drugs to patients under consideration for LT. (Hepatology 2015;61:1808–1820)

22 November 2022 in Frontiers in Endocrinology
Verified
Journal Article
Open access
MSMyeong Jun Song
Myeong Jun Song
JCJong Young Choi
Jong Young Choi
Non-alcoholic fatty liver disease (NAFLD) is the most common form of chronic liver disease in the world. It is linked mainly to insulin resistance and metabolic syndrome including obesity and dyslipidemia. In addition, various endocrine dysfunctions including polycystic ovary syndrome (PCOS) and hypogonadism are involved in the development and progression of NAFLD. We need to know the disease pathophysiology more accurately due to the heterogeneity of clinical presentation of fatty liver disease. The liver is the major metabolic organ with sexual dimorphism. Sexual dimorphism is associated not only with behavioral differences between men and women, but also with physiological differences reflected in liver metabolism. In men, normal androgen levels prevent hepatic fat accumulation, whereas androgen deficiency induce hepatic steatosis. In women, higher androgens can increase the risk of NAFLD in PCOS. Sex hormone binding globulin (SHBG) is involved in androgen regulation. Recently, SHBG may be reported as a surrogate marker for NAFLD. Therefore, this review will focus on the mechanism of androgen dysfunction in the regulation of hepatic metabolism, the risk of developing NAFLD, and the potential role of SHBG in the course of NAFLD.; Keywords: Non-alcoholic fatty liver disease, insulin resistance, sexual dimorphism, androgen, sex hormone binding globulin

1 December 2018 in Clinical Gastroenterology and Hepatology
Verified
Journal Article
Closed access
JJJeong Won Jang
Jeong Won Jang
JCJong Young Choi
Jong Young Choi
YKYoung Don Kim
Young Don Kim
JYJeong-Ju Yoo
Jeong-Ju Yoo
HWHyun Young Woo
Hyun Young Woo
KHKwang-Hyub Han
Kwang-Hyub Han

3 January 2010 in Alimentary Pharmacology & Therapeutics
Verified
Journal Article
Closed access
PDF file
Jeong Won JangJeong Won Jang
Jeong Won Jang
CYC. R. You
C. R. You
CKChang Wook Kim
Chang Wook Kim
SBS. H. Bae
S. H. Bae
SYS. K. Yoon
S. K. Yoon
JCJong Young Choi
Jong Young Choi