Publications by authors named "Yasuhiro Hisanaga"

Background & Aims: We aimed to clarify the long-term outcomes of endoscopic resection (ER) for early gastric cancers (EGCs) based on pathological curability in a multicenter prospective cohort study.

Methods: We analyzed the long-term outcomes of 9054 patients with 10,021 EGCs undergoing ER between July 2010 and June 2012. Primary endpoint was the 5-year overall survival (OS).

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Background: The current coronavirus disease 2019 (COVID-19) pandemic has strongly influenced many aspects of the medical care, including cancer surveillance.

Aims: We investigated how the COVID-19 pandemic influenced surveillance for hepatocellular carcinoma (HCC), focusing on patients with hepatitis C virus infection who were receiving surveillance for HCC after sustained virologic response (SVR) in Japan.

Methods: Patients who achieved SVR between 1995 and 2017 and continued receiving surveillance were compared by month in terms of the rate at which they kept their scheduled visits for HCC surveillance from July 2019 to May 2020.

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 We developed an e-learning program for endoscopic diagnosis of invasion depth of early gastric cancer (EGC) using a simple diagnostic criterion called non-extension sign, and the contribution of self-study quizzes to improvement of diagnostic accuracy was evaluated.  We conducted a prospective randomized controlled study that recruited endoscopists throughout Japan. After completing a pretest, the participants watched video lectures and undertook post-test 1.

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Aim: The rate of hepatocellular carcinoma (HCC) development is reportedly lower in patients with chronic hepatitis C virus (HCV) who have achieved a sustained virological response (SVR) than in patients who were unresponsive to therapy. However, the development of HCC is sometimes observed in patients with SVR. Therefore, we clarified the predictive power of clinical factors for HCC incidence in patients with SVR using receiver operating characteristic (ROC) curve analysis that takes time dependence into account.

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Background And Aim: Eradication of hepatitis C virus (HCV) with interferon (IFN)-based therapy has been reported to reduce all-cause mortality in patients with chronic HCV infection. However, the impact of HCV eradication on non-liver-related mortality and causes of death has not been sufficiently investigated in patients with progressive HCV-related fibrosis.

Methods: We enrolled 784 chronic HCV patients with progressive liver fibrosis (aspartate aminotransferase to platelet ratio index >1).

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Background & Aims: Several hepatitis B virus (HBV) markers have been identified as factors associated with the development of hepatocellular carcinoma (HCC) in patients with chronic hepatitis B (CHB). We clarified the predictive power of HBV markers for the development of HCC using receiver operating characteristic (ROC) analysis with a consideration of time dependence.

Methods: A total of 1031 CHB patients who were not treated with nucleos(t)ide analogue therapy were enrolled.

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Unlabelled: Backgrounds and study aims: Endoscopic sphincterotomy (ES) is widely accepted as first-line therapy for bile duct stones (BDS). The major long-term pancreaticobiliary complication is BDS recurrence. Whether cholecystectomy should be performed after ES, especially in elderly patients, remains controversial.

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Background & Aims: Eradication of hepatitis C virus (HCV) by interferon (IFN)-based therapy has been reported to reduce all-cause mortality rates in patients with chronic HCV infection. However, the impact of HCV eradication on non-liver-related mortality including the causes of death has not been sufficiently investigated in patients with chronic HCV infection.

Methods: We enrolled 2743 patients with chronic HCV infection.

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Background: Interferon (IFN)-based therapy has been reported to reduce the liver-related mortality rate in patients with chronic hepatitis C virus (HCV) infection. However, predictors of survival and causes of death, including non-liver-related causes, have not been sufficiently investigated in chronic HCV patients who have not received IFN-based therapy.

Methods: A total of 1723 patients with chronic HCV infection who were not treated with IFN-based therapy were enrolled.

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Background And Aim: It has been reported that the branched-chain amino acid (BCAA) to tyrosine ratio (BTR) is a useful indicator of liver function and BCAA therapy is associated with a decreased incidence of hepatocellular carcinoma (HCC). However, there has not been sufficient research on the relationship between BTR and the effects of BCAA therapy after initial treatment of HCC. We investigated the impact of BTR and BCAA therapy on survival in patients with HCC.

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Background And Aim: Hepatocellular carcinoma (HCC) can develop in patients with chronic hepatitis C after they have achieved a sustained virologic response (SVR) to antiviral therapy, that is eradication of hepatitis C virus (HCV). Thus, surveillance for HCC remains necessary after SVR. We investigated factors that are predictive of HCC in HCV-infected patients who achieved SVR.

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Background: Long-term nucleos(t)ide analogue (NA) therapy for chronic hepatitis B (CHB) patients has been reported to reduce the risk of hepatocellular carcinoma (HCC) development. However, survival rates and causes of death in CHB patients either treated or not treated with NA therapy are unclear. Therefore, we investigated the prognosis of CHB in both of these groups.

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A 37-year-old Japanese man undergoing treatment for dilated cardiomyopathy was presented with weakness and melena. He had conjunctival pallor and difficulty in standing;his blood pressure was 81/62 mmHg. Abdominal computed tomography revealed contrast dye leakage into the small intestine.

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We report a rare but severe complication of routine transnasal esophagogastroduodenoscopy (EGD). The tip of a transnasal endoscope was locked in a bent position. Since the bent tip was unable to be returned to a neutral position, the snare from another endoscope inserted transorally was used to straighten it, which allowed the transnasal endoscope to be withdrawn with only mild injury to the gastric mucosa.

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Background: Prognosis of patients with hepatocellular carcinoma (HCC) remains poor because HCC is frequently diagnosed late. Therefore, regular surveillance has been recommended to detect HCC at the early stage when curative treatments can be applied. HCC biomarkers, including Lens culinaris agglutinin-reactive fraction of alpha-fetoprotein (AFP-L3), are widely used for surveillance in Japan.

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Backgrounds/aims: We investigated the association between hepatic steatosis and hepatic expression of genes involved in innate immunity, both of which are reportedly associated with resistance to peginterferon (PEG-IFN) and ribavirin combination therapy for hepatitis C virus (HCV) infection.

Methods: A total of 122 patients infected with HCV genotype 1b who underwent and completed PEG-IFN and ribavirin combination therapy were studied. Hepatic steatosis was evaluated on the basis of the liver specimen biopsied prior to antiviral therapy.

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Aim: It has been reported that branched-chain amino acids (BCAA) supplementation can improve nutritional status and reduce liver-related complications in patients with decompensated cirrhosis. BCAA supplementation reportedly reduces the incidence of hepatocellular carcinoma (HCC) in obese cirrhotic patients infected with hepatitis C virus (HCV). We investigated the effects of oral supplementation with BCAA granules on hepatocarcinogenesis in patients with HCV-related cirrhosis using propensity score matching.

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Background And Aim: The average age of hepatitis C virus (HCV)-related hepatocellular carcinoma (HCC) patients has been rising in Japan. We evaluate characteristics of HCV-positive patients who develop HCC in older age to determine an optimal surveillance strategy.

Methods: A total of 323 patients with three or more years of follow-up before HCC diagnosis and 323 propensity-matched controls without HCC were studied.

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We investigated the gene expression of tissue inhibitor metalloproteinases (TIMPs) and matrix metalloproteinases (MMPs) and serum levels of TIMPs, MMPs, and hyaluronic acid that are associated with liver fibrosis in 64 patients with nonalcoholic fatty liver diseases (NAFLD). Whereas, no differences were found between patients with and without nonalcoholic steatohepatitis (NASH) in serum levels of hyaluronic acid when excluding NASH patients with advanced fibrosis, the quantity of MMP2 mRNA in liver tissue and serum MMP2 levels were significantly higher in patients with NASH than those without, even focusing on patients with less advanced fibrosis, indicating the initiation of liver fibrosis.

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Background & Aims: Some patients with chronic hepatitis B virus (HBV) infection progress to hepatocellular carcinoma (HCC). However, the long-term effect of nucleos(t)ide analogue (NA) therapy on progression to HCC is unclear.

Methods: Therefore, we compared chronic hepatitis B patients who received NA therapy to those who did not, using a propensity analysis.

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Background: Patients with non-alcoholic fatty liver diseases (NAFLD) are recommended to have periodic follow-up exams because these patients are at increased risk of the presence of non-alcoholic steatohepatitis (NASH), which can lead to cirrhosis or hepatocellular carcinoma. We investigated the follow-up status of NAFLD patients after a liver biopsy examination.

Methods: We compared the follow-up rates of NAFLD patients who had received an ultrasonography-guided liver biopsy and patients who had received a liver biopsy for chronic viral hepatitis (hepatitis B or C).

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We describe a 72-year-old man admitted to hospital as an emergency case of epigastric abdominal pain. CT scan visualized massive hemorrhage around the pancreatic head. Computed tomographic angiography showed stenosis at the origin of the celiac artery and a 10 mm aneurysm of the posterior inferior pancreaticoduodenal artery (PIPDA).

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Background: Increases in tumor markers are sometimes seen in patients with chronic liver disease without hepatocellular carcinoma (HCC). The aim of this study was to determine the relationship between the levels of three tumor markers [alpha-fetoprotein (AFP), Lens culinaris agglutinin-reactive fraction of AFP (AFP-L3%), and des-γ-carboxy prothrombin (DCP)] and hepatic carcinogenesis to identify hepatitis C virus (HCV) carriers at high risk for cancer development.

Methods: A total of 623 consecutive HCV carriers with follow-up periods of >3 years were included.

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The course and outcome in patients infected with hepatitis C virus (HCV) genotype 1b with partial early virologic response during combination therapy with peginterferon and ribavirin, in whom serum HCV RNA is detectable but has decreased by more than 2 log(10) 12 weeks after the start of the therapy, has not been elucidated sufficiently. The outcome in this group of patients was investigated. Serum HCV RNA levels was measured every 4 weeks in 149 patients with HCV genotype 1b infection who underwent combination therapy for 48 weeks.

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Background: The ability to predict the outcome of peginterferon (PEG-IFN) and ribavirin combination therapy based on the reduction in hepatitis C virus (HCV) RNA levels at 4 weeks after starting the therapy and amino acid substitutions in HCV was to be confirmed.

Methods: We measured the reduction in HCV RNA levels at 4 weeks after starting the combination therapy, as well as examining amino acid substitutions at residue 70 in the HCV core and within the interferon sensitivity-determining region (ISDR) of HCV non-structural protein 5A (NS5A), for 101 patients infected with HCV genotype 1b. The ability of these factors to predict a sustained virologic response (SVR) was analyzed.

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