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위십이지장 동맥에서 분지한 우간동맥 압박에 의한 담관석을 동반한 폐쇄 황달
백양현 ( Yang Hyun Baek ),최석렬 ( Suk Ryul Choi ),이종훈 ( Jong Hun Lee ),김민지 ( Min Ji Kim ),김영훈 ( Young Hoon Kim ),노영훈 ( Young Hoon Roh ),노명환 ( Myung Hwan Roh ) 대한소화기학회 2008 대한소화기학회지 Vol.52 No.6
Obstructive jaundice by vascular compression is rare. The causative arteries were identified as the right hepatic artery, gastroduodenal artery, cystic artery, proper hepatic artery, and an unspecified branch of the common hepatic artery. Also the venous system, such as enlarging collateral veins in cases of portal hypertension was a causative vessel. Herein, we describe a case of a proximal choledocholithiasis due to compression of the common bile duct by right hepatic artery originated from gastroduodenal artery. Final diagnosis and treatment were achieved through an operation.
Adipose-Liver Axis in Liver Disease
백양현 ( Yang-Hyun Baek ) 대한간학회 2021 간학회 싱글토픽 심포지움 Vol.2021 No.1
No other tissue has been as notorious as an adipose tissue recently. Adipocyte is a very complex, metabolically highly active, and potent secretory cell. However, hypertrophic and hypoxic adipocytes develop an inflammatory phenotype and secret inflammatory cytokines into circulation. Altered adipokines contribute to the development and progression of liver disease. Herein, I discuss the structure and function of normal adipose tissue, and how altered adipose tissue affects the adipose-liver axis.
Cons: Treating liver cirrhosis patients with low viral load
백양현 ( Yang-hyun Baek ) 대한간학회 2017 간학회 싱글토픽 심포지움 Vol.2017 No.1
국내에서 만성 B형 간염의 유병률은 감소하고 있는 추세이나 여전히 간경화, 간세포암의 주요한 원인이 되고 있다. 특히, 간경변 환자에서는 복수, 출혈 등과 같은 합병증과 간세포암의 발생 가능성이 높아 지속적인 경과 관찰과 치료가 매우 중요하다. 높은 바이러스 활동성을 보이는 간경변 환자에서 항바이러스제 복용을 통해 간질환의 진행과 간세포암의 발생을 낮출 수 있다는 사실은 다양한 연구를 통해서 잘 입증되어 있다. 하지만, 낮은 바이러스수치를 보이는 간경변 환자의 경우 여러 가이드라인에서 항바이러스제를 사용해 볼 수 있다고 언급하고 있으나 아직까지 근거 수준은 부족한 실정이다. 최근 낮은 바이러스 수치를 보이는 간경변 환자에서 항바이러스제 복용시 간세포암의 발생을 낮출 수 있다는 연구 결과가 있어 이에 대해 살펴보고 약제 복용의 필요성에 대해 논의하고자 한다.
윤현아 ( Hyun Ah Yoon ),최석렬 ( Seok Reyol Choi ),이종훈 ( Jong Hun Lee ),장진석 ( Jin Seok Jang ),백양현 ( Yang Hyun Baek ),이정민 ( Jeong Min Lee ),김민식 ( Min Sik Kim ) 대한내과학회 2011 대한내과학회지 Vol.80 No.5
Glomus tumors originate in modified vascular smooth muscle cells and are most commonly found in the dermis or subcutis but are rarely observed in the stomach. We report three cases of patients who presented with incidental findings of subepithelial tumors in the stomach. One patient showed a positive cushion sign, and the others showed negative cushion signs. Endoscopic ultrasonography (EUS) demonstrated sharply demarcated hypoechoic tumors with internal hyperechoic spots in the fourth layer of the gastric wall and several hypoechoic halos around the tumors. Contrast-enhanced abdominal computerized tomography (CT) showed homogeneous high enhancement of tumors up to the delayed scan, and one case showed calcification in the tumor. For treatment, laparoscopic wedge resections were performed. Histological and immunochemical analysis of the tumor cells were compatible with glomus tumors. These characteristic findings in EUS and CT seem to be useful for the diagnosis of gastric glomus tumors.
HBeAg 양성 만성 B형 간염환자에서 Clevudine, Entecavir 및 Lamivudine의 초치료 효과
배숙향 ( Suk Hyang Bae ),백양현 ( Yang Hyun Baek ),이성욱 ( Sung Wook Lee ),한상영 ( Sang Young Han ) 대한소화기학회 2010 대한소화기학회지 Vol.56 No.6
Background/Aims: Clevudine is a potent antiviral agent that has demonstrated efficacy in patients with chronic hepatitis B. This study compared the efficacy of clevudine (C), entecavir (E) and lamivudine (L) in treatment-naive patient with HBeAg-positive chronic hepatitis B. Methods: A total of 146 treatment-naive patients with HBeAg-positive chronic hepatitis B received clevudine, entecavir or lamivudine. C group (n=39) received 30 mg of clevudine, E group (n=39) received 0.5 mg of entecavir and L group (n=68) received 100 mg of lamivudine once a day for more than 48 weeks. The efficacy analysis estimated the mean changes of the HBV DNA levels as a virologic response, the normalization of the ALT levels (less than 35 IU/L) as a biochemical response and loss of HBeAg or seroconversion as a serologic response. The serum HBV DNA level was quantified by hybrid capture and real-time PCR assay. Results: Before the administration of clevudine, entecavir and lamivudine, the mean HBV DNA and ALT levels and the gender and age were well balanced among the three groups (p>0.05). For the virologic response at 48 weeks, the mean changes of the HBV DNA levels from baseline of the C, E and L groups were -3.8±2.2, -4.5±1.9 and -2.5±2.1 log copies/mL. C and E group showed superior antiviral activity compared to that of L group (p<0.0001), but no significant differences in antiviral response were noted between C and E groups. For the biochemical response at 48 weeks, the normalization of the ALT levels (less than 35 IU/L) among the C, E and L groups was 82%, 74% and 71%, respectively (p=0.46). The rates of undetectable serum HBV DNA (less than 300 copies/mL) of the C, E and L groups were 39%, 69% and 27%, respectively (p<0.0001). For the serologic response at 48 weeks, the loss of HBeAg was 13%, 31% and 24% and the seroconversion was 10%, 23% and 17%, respectively. There was no difference of efficacy among the three groups regarding ALT normalization or serologic response (p>0.05). Viral breakthrough in C group was noted at 24 weeks (5%) and 48 weeks (21%), but no biochemical breakthrough was noted. The elevation of the serum CK level was noted in only 1 patient of group C at 48 weeks (2.56%) after therapy. For the patients without or with liver cirrhosis (LC), C and E group showed superior antiviral activity compared to that of the L group, but the antiviral activity was more effective in non-LC group than LC group (p<0.0001 vs p=0.036). Conclusions: Clevudine therapy compared with lamivudine for 48 weeks showed significantly potent antiviral efficacy in treatment-naive patients with HBeAg-positive chronic hepatitis B, and especially in the non-LC patients. However, the antiviral efficacy of clevudine was similar to that of entecavir even though taking into account relatively short follow up period and retrospective study. (Korean J Gastroenterol 2010;56:365-372)
한승희 ( Seung Hee Han ),백양현 ( Yang Hyun Baek ),한상영 ( Sang Young Han ),이성욱 ( Sung Wook Lee ),정진숙 ( Jin Sook Jeong ),조진한 ( Jin Han Cho ),권희진 ( Hee Jin Kwon ) 대한내과학회 2015 대한내과학회지 Vol.88 No.3
Solitary fibrous tumors (SFTs) are histologically characterized as mesenchymal tumors of probable fibroblastic origin that can arise at pleural and extrapleural sites. SFTs originating in the pancreas are extremely rare. Here, we report a case of pancreatic SFT in a 77-year-old female who presented with jaundice. A malignant neuroendocrine tumor (NET) was suspected based on radiologic findings. However, it is difficult to differentiate SFTs from a NET from radiographs and in this report, we summarize magnetic resonance imaging findings and discuss how to distinguish between SFT and NET using immunohistochemistry. Radical excision is the treatment of choice for SFT; however, in the present case, excision was not possible and close observation showed no changes 10 months after the diagnosis. (Korean J Med 2015;88:293-298)
연구논문 : 공기방울 간농양에서 당뇨군과 비당뇨군의 비교
이창재 ( Chang Jae Lee ),한상영 ( Sang Young Han ),이성욱 ( Sung Wook Lee ),백양현 ( Yang Hyun Baek ),최석렬 ( Seok Reyol Choi ),노명환 ( Myung Hwan Roh ),이종훈 ( Jong Hoon Lee ),장진석 ( Jin Seok Jang ),한진 ( Jin Han ),조수현 대한간학회 2010 Clinical and Molecular Hepatology(대한간학회지) Vol.16 No.2
Background/Aims: Patients with diabetes mellitus (DM) are more likely to have a pyogenic liver abscess with gas formation, which is associated with higher morbidity and mortality. The morbidity and mortality in pyogenic liver abscess are also higher in DM patients than in non-DM patients. This study evaluated the morbidity, mortality, and clinical features in patients with gas-forming liver abscesses associated with DM. Methods: Among 379 cases of pyogenic liver abscess excluding malignancy from January 2001 through December 2009, 25 patients treated for pyogenic-gas-forming liver abscesses were reviewed retrospectively. We compared the morbidity, mortality, and clinical findings in patients with pyogenic-gas-forming liver abscesses between DM and non-DM patients. Results: Gas formation was present in 25 (6.6%) of 379 cases with pyogenic liver abscess. DM was combined with gas-forming liver abscesses in 19 cases (76%). The most common organism responsible for the gas formation was Klebsiella pneumoniae (82%). Complications were present in 23 cases (92%) of gas-forming liver abscesses, with pulmonary complications (especially pleural effusion) being the most common (n=14, 61%). Four patients (16%) died of sepsis. Conclusions: Gas-forming liver abscesses are not uncommon in cases of pyogenic liver abscesses and are associated with high morbidity and mortality rates. The clinical manifestations and complications do not differ significantly between DM and non-DM patients.
폐쇄 종양 형태로 발현된 원발 에스 결장 MALT 림프종
정창길 ( Chang Kil Jung ),이종훈 ( Jong Hoon Lee ),이창민 ( Chang Min Lee ),원종진 ( Jong Jin Won ),백양현 ( Yang Hyun Baek ),이정민 ( Jeong Min Lee ),이신애 ( Sin Ae Lee ) 대한소화기학회 2009 대한소화기학회지 Vol.54 No.2
The gastrointestinal (GI) tract is the most frequently involved site of mucosa-associated lymphoid tissue (MALT) lymphoma. Stomach is the most common site of involvement among the GI tract. However, MALT lymphoma of the large intestine is rare. A diagnosis is established by pathological examination of the surgical or endoscopic specimens. A 72-year-old man with low abdominal pain was diagnosed as a sigmoid MALT lymphoma, which was noted as an obstructing mass in a colonoscopic examination. A left hemicolectomy was performed, and the patient has had no recurrence postoperatively without any chemotherapy. (Korean J Gastroenterol 2009;54:126-129)
이창민 ( Chang Min Lee ),노명환 ( Myung Hwan Roh ),정창길 ( Chang Kil Jung ),원종진 ( Jong Jin Won ),백양현 ( Yang Hyun Baek ),이성욱 ( Sung Wook Lee ),최석렬 ( Seok Ryeol Choi ),조진한 ( Jin Han Cho ) 대한소화기학회 2009 대한소화기학회지 Vol.53 No.6
Autoimmune pancreatitis is a distinct disease characterized by the presence of autoantibodies and hyper-gammaglobulinemia, inflammation of the pancreatic parenchyma, and irregular stricture of the pancreatic duct. The involvement of distal common bile duct is frequently observed, but intrahepatic bile duct involvement is very rare, which seem to have similar feature to primary sclerosing cholangitis. We report a case of the patient with autoimmune pancreatitis combined with extensive involvement of extrahepatic and intrahepatic bile duct, which had a favorable response to steroid therapy. (Korean J Gastroenterol 2009;53:383-387)