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Formalin fixation on HER-2 and PD-L1 expression in gastric cancer:A pilot analysis using the same surgical specimens with different fixation times

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World Journal of Clinical Cases 2019年第4期7卷 419-430页

作者： Keita Kai Yukie Yoda atsushi kawaguchi Akimichi Minesaki Hironori Iwasaki Shinichi Aishima Hirokazu Noshiro Department of Pathology Saga University Hospital Department of Surgery Saga University Faculty of Medicine Center for Comprehensive Community Medicine Saga University Faculty of Medicine Department of Pathology and Microbiology Saga University Faculty of Medicine Department of Otolaryngology - Head and Neck Surgery Saga University Faculty of Medicine

BACKGROUND The needs for human epidermal growth factor receptor 2(HER-2) and/or programmed death-ligand 1(PD-L1) evaluations in gastric cancer are dramatically increasing. Although the importance of standardization of sample fixation has been widely recognized, most of the evidence regarding the fixation duration or type of fixing solution are based on breast *** To investigate the real effects of fixation conditions on HER-2 testing or PD-L1 testing for gastric cancer using gastrectomy *** Thirty-two patients who underwent gastrectomy for gastric cancer were *** resected specimens were each divided into four pieces and fixed in four strictly controlled different durations(6 h, 24 h, and 48 h, and 1 wk) by 10%formalin(n = 22) or 10% neutral buffered formalin(NBF)(n = 10).Immunohistochemistry(IHC) of HER-2 and PD-1 was performed, and a pathology examination was conducted. In the HER-2-immunoreactive cases, all four specimens were subjected to dual-color in situ hybridization(DISH). Five cases were assessed as HER-2-positive by IHC and DISH. We used the cut-off values of 1%, 10%, and 50% to assess the IHC findings of *** No significant difference was observed in comparisons between the shorter fixation period groups(6 h, 24 h, and 48 h) and the prolonged fixation period(1 wk) group in the HER-2 and PD-L1 analyses. Although no significant difference was observed between 10% formalin and 10% NBF within 1 wk of fixation, the superiority of 10% NBF was confirmed in a long-term(> 3 mo) fixation in both the HER-2 and PD-L1 *** In this small-numbered pilot study, prolonged fixation within 1 wk showed no inferiority in HER-2 or PD-L1 testing. However, a large-numbered prospective study is needed to obtain conclusive results.

关键词： Gastric cancer Programmed death-ligand1 Human epidermal growth factor receptor2 Neutral buffered formalin Fixation time

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Impact of smoking habit on surgical outcomes in non-B non-C patients with curative resection for hepatocellular carcinoma

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World Journal of Gastroenterology 2017年第8期23卷 1397-1405页

作者： Keita Kai Hiroki Koga Shinichi Aishima atsushi kawaguchi Koutaro Yamaji Takao Ide Junji Ueda Hirokazu Noshiro Department of Pathology Saga University Hospital Departments of Surgery Saga University Hospital Pathology and Microbiology Saga University Hospital Center for Comprehensive Community Medicine Saga University Faculty of Medicine

To analyzed the correlation between smoking status and surgical outcomes in patients with non-B non-C hepatocellular carcinoma (NBNC-HCC), and we investigated the patients’ clinicopathological characteristics according to smoking *** retrospectively analyzed the consecutive cases of 83 NBNC-HCC patients who underwent curative surgical treatment for the primary lesion at Saga University Hospital between 1984 and December 2012. We collected information about possibly carcinogenic factors such as alcohol abuse, diabetes mellitus, obesity and smoking habit from medical records. Smoking habits were subcategorized as never, ex- and current smoker at the time of surgery. The diagnosis of non-alcoholic steatohepatitis (NASH) was based on both clinical information and pathological *** abuse, diabetes mellitus, obesity and NASH had no significant effect on the surgical outcomes. Current smoking status was strongly correlated with both overall survival (P = 0.0058) and disease-specific survival (P = 0.0105) by multivariate analyses. Subset analyses revealed that the current smokers were significantly younger at the time of surgery (P = 0.0002) and more likely to abuse alcohol (P = 0.0188) and to have multiple tumors (P = 0.023).CONCLUSIONCurrent smoking habit at the time of surgical treatment is a risk factor for poor long-term survival in NBNC-HCC patients. Current smokers tend to have multiple HCCs at a younger age than other patients.

关键词： Hepatocellular carcinoma Non-B Non-C Smoking Surgery Prognosis

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Correlation between smoking habit and surgical outcomes on viral-associated hepatocellular carcinomas

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World Journal of Gastroenterology 2018年第1期24卷 58-68页

作者： Keita Kai Sho Komukai Hiroki Koga Koutaro Yamaji Takao Ide atsushi kawaguchi Shinichi Aishima Hirokazu Noshiro Department of Pathology Saga University Hospital Clinical Research Center Saga University Hospital Department of Surgery Saga University Faculty of Medicine Department of Pathology and Microbiology Saga University Faculty of Medicine Center for Comprehensive Community Medicine Saga University Faculty of Medicine

AIM To investigate the association between smoking habits and surgical outcomes in hepatitis B virus(HBV)-related hepatocellular carcinoma(HCC)(B-HCC) and hepatitis C virus(HCV)-related HCC(C-HCC) and clarify the clinicopathological features associated with smoking status in B-HCC and C-HCC *** We retrospectively examined the cases of the 341 consecutive patients with viral-associated HCC(C-HCC,n = 273; B-HCC, n = 68) who underwent curative surgery for their primary lesion. We categorized smoking status at the time of surgery into never, exand current smoker. We analyzed the B-HCC and C-HCC groups' clinicopathological features and surgical outcomes, i.e., disease-free survival(DFS), overall survival(OS), and disease-specific survival(DSS).Univariate and multivariate analyses were performed using a Cox proportional hazards regression model. We also performed subset analyses in both patient groups comparing the current smokers to the other *** The multivariate analysis in the C-HCC group revealed that current-smoker status was significantly correlated with both OS(P = 0.0039) and DSS(P = 0.0416).In the B-HCC patients, no significant correlation was observed between current-smoker status and DFS, OS,or DSS in the univariate or multivariate analyses. The subset analyses comparing the current smokers to the other patients in both the C-HCC and B-HCC groups revealed that the current smokers developed HCC at significantly younger ages than the other patients irrespective of viral infection *** A smoking habit is significantly correlated with the overall and disease-specific survivals of patients with C-HCC. In contrast, the B-HCC patients showed a weak association between smoking status and surgical outcomes.

关键词： Hepatocellular carcinoma Hepatitis B virus Hepatitis C virus Smoking Surgery Prognosis

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Occult hepatitis B virus infection and surgical outcomes in non-B, non-C patients with curative resection for hepatocellular carcinoma

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World Journal of Hepatology 2017年第35期9卷 1286-1295页

作者： Hiroki Koga Keita Kai Shinichi Aishima atsushi kawaguchi Koutaro Yamaji Takao Ide Junji Ueda Hirokazu Noshiro Department of Surgery Saga University Faculty of Medicine Department of Pathology Saga University Hospital Department of Pathology and Microbiology Saga University Faculty of Medicine Center for Comprehensive Community Medicine Saga University Faculty of Medicine

AIM To investigate the prevalence, clinicopathological characteristics and surgical outcomes of occult hepatitis B virus(HBV) infection(OBI) in patients with non-B, non-C(NBNC) hepatocellular carcinoma(HCC).METHODS This study retrospectively examined the cases of 78 NBNC patients with curative resection for HCC for whom DNA could be extracted from formalin-fixed paraffin-embedded tissue. OBI was determined by the HBV-DNA amplification of at least two different sets of primers by TaqM an realtime polymerase chain reaction. Possibly carcinogenetic factors such as alcohol abuse, diabetes mellitus, obesity and non-alcoholic steatohepatitis(NASH) were examined. Surgical outcomes were evaluated according to diseasefree survival(DFS), overall survival(OS) and diseasespecific survival(DSS).RESULTS OBI was found in 27/78 patients(34.6%) with NBNC HCC. The OBI patients were significantly younger than the non-OBI cases at the time of surgery(average age 63.0 vs 68.1, P = 0.0334) and the OBI cases overlapped with other etiologies significantly more frequently compared to the non-OBI cases(P = 0.0057). OBI had no impact on the DFS, OS or DSS. Only tumorrelated factors affected these surgical *** Our findings indicate that OBI had no impact on surgical outcomes. The surgical outcomes of NBNC HCC depend on early tumor detection; this reconfirms the importance of a periodic medical examination for individuals who have NBNC HCC risk factors.

关键词： Hepatocellular carcinoma Non-B non-C Occult hepatitis B virus infection Surgery Surgical outcome

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Occult HBV infection status and its impact on surgical outcomes in patients with curative resection for HCV-associated hepatocellular carcinoma

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Hepatobiliary Surgery and Nutrition 2018年第6期7卷 443-453页

作者： Koutaro Yamaji Keita Kai Sho Komukai Hiroki Koga Takao Ide atsushi kawaguchi Hirokazu Noshiro Shinichi Aishima Department of Surgery Saga University Faculty of MedicineSaga 849-8501Japan Department of Pathology&Microbiology Saga University Faculty of MedicineSaga 849-8501Japan Department of Pathology Saga University HospitalSaga 849-8501Japan Clinical Research Center Saga University HospitalSaga 849-8501Japan Center for Comprehensive Community Medicine Saga University Faculty of MedicineSaga 849-8501Japan

Background:We sought to clarify the prevalence of occult hepatitis B virus(HBV)infection(OBI)and to determine whether OBI affects the surgical outcomes in curatively resected Japanese patients with hepatitis C virus(HCV)-related hepatocellular carcinoma(HCC).Methods:A total of 257 patients with HCV-related HCC who underwent curative surgical resection were *** enrolled patients were serologically negative for HBV surface antigen and positive for HCV *** was extracted from formalin-fixed paraffin-embedded liver *** was determined by the HBV-DNA amplification of at least two different sets of primers by TaqMan real-time polymerase chain *** outcomes were evaluated according to overall survival(OS),disease-specific survival(DSS),and disease-free survival(DFS).Results:OBI was identified in 15 of the 257(5.8%)*** the multivariate analyses,the factors significantly correlated with OS were BMI>25(P=0.0416),portal vein invasion(P=0.0065),and multiple tumors(P=0.0064).The only factor significantly correlated with DSS was T-stage(P=0.0275).The factors significantly correlated with DFS were liver fibrosis(P=0.0017)and T-stage(P=0.0001).The status of OBI did not show any significant correlation with OS,DSS or DFS,but a weak association with DSS(P=0.0603)was ***:The prevalence of OBI was 5.8%in 257 cases of HCV-related *** a weak association between DSS and OBI was observed,and statistical analyses were limited by small number of OBI cases,no significant correlation between OBI and surgical outcomes was detected.

关键词： Occult hepatitis B virus infection(OBI) hepatocellular carcinoma(HCC) hepatitis C virus(HCV) surgery prognosis

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Restriction on the form of the quark anomalous magnetic moment from lattice QCD results

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Chinese Physics C 2023年第6期47卷 108-121页

作者： Mamiya kawaguchi 黄梅 School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

The quark anomalous magnetic moment(AMM)is dynamically generated through spontaneous chiral symmetry *** has been revealed that,even though its exact form is still unknown,the quark AMM is essential to exploring quark matter properties and QCD phase structure under external magnetic *** this study,we take three different forms of the quark AMM and investigate its influence on the chiral phase transition under a magnetic *** general,a negative(positive)quark AMM acts as a magnetic-catalyzer(magnetic-inhibitor)for chiral symmetry *** is found that a constant quark AMM drives an unexpected 1st order chiral phase transition,a quark AMM proportional to the chiral condensate flips the sign on the chiral condensate,and a quark AMM proportional to the square of the chiral condensate suppresses the magnetic enhancement in the chiral condensate at finite temperatures while retaining the chiral crossover phase *** also evaluate the intrinsic temperature dependence of the effective AMM form by fitting the effective model result of the chiral condensate to lattice QCD data,which may have a nontrivial correlation with the chiral phase transition.

关键词： chiral symmetry phase diagram of QCD external magnetic field chiral effective model fi-nite temperature field theory

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A comparison of the efficacy of dutasteride on reducing lower urinary tract symptoms among patients with small versus large benign prostatic hyperplasia

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Current Urology 2024年第3期18卷 199-202页

作者： Kazuyoshi Shigehara Yuki Kato Shohei kawaguchi Kouji Izumi Yoshifumi Kadono atsushi Mizokami Department of Urology Kanazawa University Graduate School of Medical ScienceKanazawaIshikawaJapan

Background Only a few reports have currently studied the efficacy of dutasteride in patients with small benign prostatic hyperplasia(BPH).We investigated the efficacy of dutasteride on reducing lower urinary tract symptoms among *** and methods A total of 81 patients with BPH who completed 52weeks of 0.5?mg dutasteride treatment were *** patient filled out the International Prostatic Symptom Score(IPSS)and overactive bladder symptom score(OABSS)at baseline and at the 6-and 12-month follow-up *** testosterone,prostate-specific antigen,adenoma/prostate volume(PV),uroflowmetry analysis,and postvoid residual volume were evaluated at baseline and at the 12-month follow-up *** enrolled patients were divided into 2 groups according to PV at *** groups were as follows:Group A(PV≥30 mL)and Group B(PV<30 mL).Results Groups A and B had mean PVs of 52.1 and 23.6 mL and mean IPSS scores of 16.7 and 14.4,*** A had significantly higher OABSS and prostate-specific antigen levels at baseline than Group B,while no significant differences in any other baseline characteristics was *** dutasteride treatment,adenoma volume and PV decreased significantly,while testosterone level showed a significant increase in both *** A showed significant improvements in the total IPSS,voiding and storage subscore of the IPSS,OABSS,maximum flow rate,and postvoid residual *** B,on the other hand,also showed significant improvements only in the total IPSS,voiding subscore of the IPSS,and maximum flow *** The present study suggests a possible beneficial effect of dutasteride treatment on the reduction of lower urinary tract symptoms in patients with small and large ***,the effectiveness of dutasteride was limited compared to patients with large BPH(PV≥30 mL).

关键词： Benign prostatic hyperplasia Dutasteride Lower urinary tract symptoms Testosterone Voiding dysfunction

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Natural history of inferior mesenteric arteriovenous malformation that led to ischemic colitis: A case report

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World Journal of Clinical Cases 2021年第2期9卷 396-402页

作者： Yushi Kimura Takeshi Hara Ryotaro Nagao Takayuki Nakanishi Junji kawaguchi atsushi Tagami Tsuneko Ikeda Hiroshi Araki Hisashi Tsurumi Department of Gastroenterology Matsunami General HospitalHashima-gun 501-6062Japan Department of Hematology Matsunami General HospitalHashima-gun 501-6062Japan Department of Pathology Matsunami General HospitalHashima-gun 501-6062Japan

BACKGROUND Ischemic colitis with inferior mesenteric arteriovenous malformation(AVM)is a rare *** a few reports have been published,no report has described the natural history of idiopathic mesenteric *** SUMMARY A 50-year-old male was admitted to our hospital due to abdominal pain that had persisted for 3 mo and bloody *** had no history of trauma or abdominal *** had undergone two colonoscopies 6 mo and 2 years ago,and they showed only a *** was diagnosed with ischemic colitis with inferior mesenteric AVM following contrast-enhanced abdominal computed tomography(CT)and underwent rectal low anterior *** has not had a recurrence of symptoms for 3 *** history showed that he had undergone non-enhanced abdominal CT 2,5,and 8 years ago when he had attacks of urinary ***,dilation of blood vessels around the rectosigmoid colon could have been detected 5 years ago,and these findings gradually became more *** This is the first report of the natural history of inferior mesenteric AVM.

关键词： Inferior mesenteric arteriovenous malformation Ischemic colitis Natural history Case report Arteriovenous malformation

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Motion Analysis of Trunk Using Simplified Human Model in Sagittal Plane

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Transactions of Nanjing University of Aeronautics and Astronautics 2018年第1期35卷 20-27页

作者： Masato kawaguchi Shoichiro Takehara Division of Mechanical Engineering Graduate School of Science and TechnologySophia University Department of Engineering and Applied Sciences Sophia University

The mass of very small vehicles is often comparable to that of their drivers,and thus there is a greater degree of coupling between the vehicle and the driver,compared with a case for traditional *** developing small vehicles,it is necessary to give ample consideration to the dynamics of the person who ride ***,a model of a human body riding a small personal vehicle was constructed to investigate the dynamics of the person inside such a ***,an experiment on posture maintenance by acceleration of direction of travel was conducted and the parameters for posture control were identified using agenetic *** shows that body behavior could be successfully simulated using the proposed model,and the control parameters were effective in determining the posture maintenance characteristics of the vehicle occupant.

关键词： human dynamics trunk simulation human body vehicles

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Isolated intrapancreatic Ig G4-related sclerosing cholangitis

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World Journal of Gastroenterology 2015年第4期21卷 1334-1343页

作者： Takahiro Nakazawa Yushi Ikeda Yoshiaki kawaguchi Hirohisa Kitagawa Hiroki Takada Yutaka Takeda Isamu Makino Naohiko Makino Itaru Naitoh atsushi Tanaka Department of Gastroenterology and Metabolism Nagoya City University Graduate School of Medical SciencesNagoya 467-8601Japan Department of Gastroenterology Yamagata University Faculty of MedicineYamagata 990-9585Japan Department of Gastroenterology Tokai University School of MedicineKanagawa 259-1153Japan Gastroenterologic Surgery Division of Cancer Medicine Graduate School of Medical ScienceKanazawa UniversityKanazawa 920-8640Japan Department of Gastroenterology Kasugai Municipal HospitalKasugai 486-8510Japan Department of Surgery Kansai Rosai HospitalOsaka 660-8511Japan Department of Medicine Teikyo University School of MedicineTokyo 173-8606Japan

Immunoglobulin G4-related sclerosing cholangitis(Ig G4-SC) is frequently associated with type 1 autoimmune pancreatitis(AIP). Association with AIP can be utilized in the diagnosis of Ig G4-SC. However, some cases of Ig G4-SC are isolated from AIP, which complicates the diagnosis. Most of the reported cases of isolated Ig G4-SC displayed hilar biliary strictures, whereas isolated Ig G4-SC with intrapancreatic biliary stricture is very rare. Recently, we have encountered 5 isolated intrapancreatic Ig G4-SC cases that were not associated with AIP, three of which were pathologically investigated after surgical operation. They all were males with a mean age of 74.2 years. The pancreas was not enlarged in any of these cases. No irregular narrowing of the main pancreatic duct was found. Bile duct wall thickening in lesions without luminal stenosis was detected by abdominal computed tomography in all five cases, by endoscopic ultrasonography in two out of four cases and by intraductal ultrasonography in all three cases. In three cases, serum Ig G4 levels were within the normal limits. The mean serum Ig G4 level measured before surgery was 202.1 mg/d L(4 cases). Isolated intrapancreatic Ig G4-SC is difficult to diagnose, especially if the Ig G4 level remains normal. Thus, this type of Ig G4-SC should be suspected in addition to cholangiocarcinoma and pancreatic cancer if stenosis of intrapancreatic bile duct is present.

关键词： Immunoglobulin G4-related sclerosing cholangitis I

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