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| 1 | Serrated polyps of the colon and rectum: Endoscopic features including image enhanced endoscopy显示文摘In this review, I outline the characteristic endoscopic findings of serrated lesions of the colorectum based on image enhanced endoscopy(IEE). Histopathologically, lesions with serrated structures are typically classified into the following three types based: hyperplastic polyps(HPs), traditional serrated adenomas(TSAs), and sessile serrated adenoma/polyps(SSA/Ps). Both HP and SSA/P often present as dark-green colors on auto fluorescence imaging(AFI) colonoscopy that are similar to the normal surrounding mucosa. In contrast, TSAs often have elevated shapes and present as magenta colors that are similar to the tubular adenomas. The superficial type of TSA also includes many lesions that present as magenta colors. When SSA/Ps are associated with cytological dysplasia, many lesions present with magenta colors, whereas lesions that are not associated with cytological dysplasia present with dark-green colors. When observed via narrow band imaging(NBI), many SSA/P include lesions with strong mucous adhesions. Because these lesions are observed with reddish mucous adhesions, we refer to them as 'red cap sign' and place such signs among the typical findings of SSA/P. Because the dilatation of the pit in SSA/P is observed as a round/oval black dot on magnified observations, we refer to this finding as Ⅱ-dilatation pit(Ⅱ-D pit) and also positioned it as a characteristic finding of SSA/P. In contrast, dilatations of the capillary vessels surrounding the glands, such as those that occur in tubular adenoma, are not considered to be useful for differentiating HPs from SSA/Ps. However, in cases in which SSA/P is associated with cytological dysplasia, the dilatation of capillary vessels is observed in the same area. When submucosal layer invasion occurs in the same area, the blood flow presents with irregularities that are similar to those of common colorectal cancer at an early stage and disappears as the invasion proceeds deeply. The surface pattern of invasive cancer that is observed at the tumor surface is also likely to disappear. Based on the above results, we considered that the differentiations between HP and TSA, between TSA and SSA/P, and between HP and SSA/P might become easier due to the concomitant use of white light observation and IEE. We also concluded that AFI and NBI can be useful modalities for SSA/P lesions associated with cytological dysplasia. | Shoichi Saito Hisao Tajiri Masahiro Ikegami | 2015 | World Journal of Gastrointestinal Endoscopy2015，7，9： | 8 |
| 2 | Hepatitis C virus enhances incidence of idiopathic pulmonary fibrosis显示文摘AIM: To investigate the cumulative development incidence and predictive factors for idiopathic pulmonary fibrosis in hepatitis C virus (HCV) positive patients. METHODS: We studied 6150 HCV infected patients who were between 40-70 years old (HCV-group). Another 2050 patients with hepatitis B virus (HBV) were selected as control (HBV-group). The mean observation period was 8.0 ± 5.9 years in HCV-group and 6.3 ± 5.5 years in HBV-group. The primary goal is the development of idiopathic pulmonary fibrosis (IPF) in both groups. The cumulative appearance rate of IPF and independent factors associated with the incidence rate of IPF were calculated using the Kaplan- Meier method and the Cox proportional hazard model. All of the studies were performed retrospectively by collecting and analyzing data from the patient records in our hospital. RESULTS: Fifteen patients in HCV-group developedIPF. On the other hand, none of the patients developed IPF in HBV-group. In HCV-group, the cumulative rates of IPF development were 0.3% at 10th year and 0.9% at 20th year. The IPF development rate in HCV-group was higher than that in HBV-group (P = 0.021). The IPF development rate in patients with HCV or HBV was high with statistical significance in the following cases: (1) patients ≥ 55 years (P < 0.001); (2) patients who had smoking index (package per day × year) of ≥ 20 (P = 0.002); (3) patients with liver cirrhosis (P = 0.042). CONCLUSION: Our results indicate that age, smoking and liver cirrhosis enhance the development of IPF in HCV positive patients. | Yasuji Arase Fumitaka Suzuki Yoshiyuki Suzuki Norio Akuta Masahiro Kobayashi Yusuke Kawamura Hiromi Yatsuji Hitomi Sezaki Tetsuya Hosaka Miharu Hirakawa Satoshi Saito Kenji Ikeda Hiromitsu Kumada | 2008 | World Journal of Gastroenterology2008，14，38： | 8 |
| 3 | A multicenter retrospective study of endoscopic resection for early gastric cancer显示文摘 | Ichiro Oda Daizo Saito Masahiro Tada Hiroyasu Iishi Satoshi Tanabe Tsuneo Oyama Toshihiko Doi Yoshihide Otani Junko Fujisaki Yoichi Ajioka Tsutomu Hamada Haruhiro Inoue Takuji Gotoda Shigeaki Yoshida | 2006 | Gastric Cancer2006，，4： | 6 |
| 4 | Characteristics of symptomatic reflux episodes in Japanese proton pump inhibitor-refractory non-erosive reflux disease patients显示文摘AIM: To clarify the pathogenesis of gastroesophageal reflux disease symptoms in non-erosive reflux disease(NERD) patients.METHODS: Thirty-five NERD patients with persistent symptoms, despite taking rabeprazole 10 mg twice daily for at least 8 wk, were included in this study. All patients underwent 24 h combined impedance- p H on rabeprazole. The symptom index(SI) was considered to be positive if ≥ 50%, and proximal reflux episodes were determined when reflux reached 15 cm above the proximal margin of the lower esophageal sphincter.RESULTS: In 14(40%) SI-positive patients, with liquid weakly acid reflux, the occurrence rate of reflux symptoms was significantly more frequent in proximal reflux episodes(46.7%) than in distal ones(5.7%)(P < 0.001). With liquid acid reflux, there were no significant differences in the occurrence rate of reflux symptoms between proximal reflux episodes(38.5%) and distal ones(20.5%)(NS). With mixed liquid-gas weakly acid reflux, the occurrence rate of reflux symptoms in proximal reflux episodes was significantly more frequent(31.0%) than in distal reflux ones(3.3%)(P < 0.001). With mixed liquid-gas acid reflux, there were no significant differences in the occurrence rate of reflux symptoms between proximal reflux episodes(29.4%) and distal ones(14.3%)(NS).CONCLUSION: The proximal extent of weakly acidic liquid and mixed liquid-gas reflux is a major factor associated with reflux perception in SI-positive patients on proton pump inhibitor therapy. | Kenichiro Nakagawa Tomoyuki Koike Katsunori Iijima Masahiro Saito Hiroki Kikuchi Waku Hatta Nobuyuki Ara Kaname Uno Naoki Asano Tooru Shimosegawa | 2015 | World Journal of Gastroenterology2015，21，47： | 4 |
| 5 | Factors associated with complicated erosive esophagitis: A Japanese multicenter, prospective, cross-sectional study显示文摘AIM To assess the clinical characteristics of patients with complicated erosive esophagitis(EE) and their associated factors.METHODS This prospective, cross-sectional study included patients diagnosed with EE by upper gastrointestinal endoscopy between October 2014 and March 2015 at 106 Japanese hospitals. Data on medical history, general condition, gastrointestinal symptoms, lifestyle habits, comorbidities, and endoscopic findings were collected using a standard form to create a dedicated database. Logistic regression analysis was used to calculate adjusted odds ratios(aO R) and 95%CI for the association with complicated EE.RESULTS During the study period, 1749 patients diagnosed with EE, 38.3% of whom were prescribed proton pump inhibitors(PPIs) were included. Of them, 143(8.2%) had EE complications. Esophageal bleeding occurred in 84(4.8%) patients, esophageal strictures in 45(2.6%) patients, and 14(0.8%) patients experienced both. Multivariate analysis showed that increased age(a OR: 1.05; 95%CI: 1.03-1.08), concomitant use of psychotropic agents(a OR: 6.51; 95%CI: 3.01-13.61), and Los Angeles grades B(a OR: 2.69; 95%CI: 1.48-4.96), C(aO R: 15.38; 95%CI: 8.62-28.37), and D(aO R: 71.49; 95%CI: 37.47-142.01) were significantly associated with complications, whereas alcohol consumption 2-4 d/wk was negatively associated(a OR: 0.23; 95%CI: 0.06-0.61). Analyzing associated factors with each EE complication separately showed esophageal ulcer bleeding were associated with increased age(a OR: 1.05; 95%CI: 1.02-1.07) and Los Angeles grades B(aO R: 3.60; 95%CI: 1.52-8.50), C(a OR: 27.61; 95%CI: 12.34-61.80), and D(a OR: 119.09; 95%CI: 51.15-277.29), while esophageal strictures were associated with increased age(a OR: 1.07; 95%CI: 1.04-1.10), gastroesophageal reflux symptom(aO R: 2.51; 95%CI: 1.39-4.51), concomitantuse of psychotropic agents(a OR: 11.79; 95%CI: 5.06-27.48), Los Angeles grades C(aO R: 7.35; 95%CI: 3.32-16.25), and D(a OR: 20.34; 95%CI: 8.36-49.53) and long-segment Barrett's esophagus(a OR: 4.63; 95%CI: 1.64-13.05).CONCLUSION Aging and severe EE were common associated factors, although there were more associated factors in esophageal strictures than esophageal ulcer bleeding. Despite the availability and widespread use of PPIs, EE complications are likely to remain a problem in Japan owing to the aging population and high-stress society. | Masahiro Sakaguchi Noriaki Manabe Nobuo Ueki Jun Miwa Tomoki Inaba Norimasa Yoshida Kouichi Sakurai Masahiro Nakagawa Hajime Yamada Michiya Saito Koji Nakada Katsuhiko Iwakiri Takashi Joh Ken Haruma | 2017 | World Journal of Gastroenterology2017，23，2： | 3 |
| 6 | Management of gastric mucosa-associated lymphoid tissue lymphoma in patients with extra copies of the MALT1 gene显示文摘AIM To identify the clinical features of gastric mucosaassociated lymphoid tissue(MALT) lymphoma with extra copies of MALT1.METHODS This is a multi-centered,retrospective study. We reviewed 146 patients with MALT lymphoma in the stomach who underwent fluorescence in situ hybridization analysis for t(11;18) translocation. Patients were subdivided into patients without t(11;18) translocation or extra copies of MALT1(Group A,n = 88),patients with t(11;18) translocation(Group B,n = 27),and patients with extra copies of MALT1(Group C,n = 31). The clinical background,treatment,and outcomes of each group were investigated.RESULTS Groups A and C showed slight female predominance,whereas Group B showed slight male predominance. Mean ages and clinical stages at lymphoma diagnosis were not different between groups. Complete response was obtained in 61 patients in Group A(69.3%),22 in Group B(81.5%),and 21 in Group C(67.7%). Helicobacter pylori(H. pylori) eradication alone resulted in complete remission in 44 patients in Group A and 13 in Group C. In Group B,14 patients underwent radiotherapy alone,which resulted in lymphoma disappearance. Although the difference was not statistically significant,event-free survival in Group C tended to be inferior to that in Group A(P = 0.10).CONCLUSION Patients with t(11;18) translocation should be treated differently from others. Patients with extra copies of MALT1 could be initially treated with H. pylori eradication,similar to patients without t(11;18) translocation or extra copies of MALT1. | Masaya Iwamuro Ryuta Takenaka Masahiro Nakagawa Yuki Moritou Shunsuke Saito Shinichiro Hori Tomoki Inaba Yoshinari Kawai Tatsuya Toyokawa Takehiro Tanaka Tadashi Yoshino Hiroyuki Okada | 2017 | World Journal of Gastroenterology2017，23，33： | 3 |
| 7 | A multicenter retrospective study of endoscopic resection for early gastric cancer显示文摘 | Ichiro Oda Daizo Saito Masahiro Tada Hiroyasu Iishi Satoshi Tanabe Tsuneo Oyama Toshihiko Doi Yoshihide Otani Junko Fujisaki Yoichi Ajioka Tsutomu Hamada Haruhiro Inoue Takuji Gotoda Shigeaki Yoshida | 2006 | Gastric Cancer2006，，4： | 3 |
| 8 | Usefulness of fecal lactoferrin and hemoglobin in diagnosis of colorectal diseases显示文摘AIM:To evaluate prospectively usefulness of fecal lactoferrin(Lf)and fecal hemoglobin(Hb)in the diagnosis of colorectal diseases.METHODS:Fecal Lf and Hb were measured using ELISA in 872 patients before they underwent colorectal endoscopy.RESULTS:Lf was positive in 18(50%)of 36 patients with colorectal cancer,25(15.9%)of 157 with colorectal polyps,29(46.8%)of 62 with ulcerative colitis,and 25(62.5%)of 40(62.5%)with Crohn's disease.The Hb-positive rates were 50%,12.1%,41.9% and 32.5%,respectively.Of the 318 patients free of abnormalities by colorectal endoscopy,Lf was positive in 29(9.1%)and Hb was positive in 15(4.7%).Among patients with Crohn's disease,the Lf-positive rate was significantly higher than the Hb-positive rate.If either high Lf or Hb levels were considered positive,the positive rates rose to 61.1%,51.6%,and 67.5% in the colorectal cancer group,ulcerative colitis group,and Crohn's disease group,respectively.If both high Lf and Hb levels were rated positive,the positive predictive values(PPV)were 21% for colorectal cancer,33% for ulcerative colitis,and 17% for Crohn's disease,and PPV of high Hb level alone was 18%,25% and 13%,respectively.CONCLUSION:Fecal Lf and Hb were found useful in the detection of colorectal diseases,and the combination of the two measurements appears to increase the sensitivity and efficacy of diagnosis. | Ichiro Hirata Masahiro Hoshimoto Osamu Saito Masanobu Kayazawa Takashi Nishikawa Mitsuyuki Murano Ken Toshina Fang-Yu Wang Ryoichi Matsuse | 2007 | World Journal of Gastroenterology2007，13，10： | 3 |
| 9 | Effect of type 2 diabetes on risk for malignancies includes hepatocellular carcinoma in chronic hepatitis C显示文摘 | Yasuji Arase Mariko Kobayashi Fumitaka Suzuki Yoshiyuki Suzuki Yusuke Kawamura Norio Akuta Masahiro Kobayashi Hitomi Sezaki Satoshi Saito Tetsuya Hosaka Kenji Ikeda Hiromitsu Kumada Tetsuro Kobayashi | 2013 | Hepatology2013，，3： | 2 |
| 10 | Altered Cognitive Function of Prefrontal Cortex During Error Feedback in Patients With Irritable Bowel Syndrome, Based on fMRI and Dynamic Causal Modeling显示文摘 | Emiko Aizawa Yasuhiro Sato Takanori Kochiyama Naohiro Saito Masahiro Izumiyama Joe Morishita Motoyori Kanazawa Keisetsu Shima Hajime Mushiake Michio Hongo Shin Fukudo | 2012 | Gastroenterology2012，，5： | 2 |
| 11 | Guidelines for the management of biliary tract and ampullary carcinomas: surgical treatment显示文摘 | Satoshi Kondo Tadahiro Takada Masaru Miyazaki Shuichi Miyakawa Kazuhiro Tsukada Masato Nagino Junji Furuse Hiroya Saito Toshio Tsuyuguchi Masakazu Yamamoto Masato Kayahara Fumio Kimura Hideyuki Yoshitomi Satoshi Nozawa Masahiro Yoshida Keita Wada Satoshi | 2008 | Journal of Hepato - Biliary - Pancreatic Surgery2008，，1： | 2 |
| 12 | JGES guidelines for colorectal endoscopic submucosal dissection/endoscopic mucosal resection显示文摘 | Shinji Tanaka Hiroshi Kashida Yutaka Saito Naohisa Yahagi Hiroo Yamano Shoichi Saito Takashi Hisabe Takashi Yao Masahiko Watanabe Masahiro Yoshida Shin‐ei Kudo Osamu Tsuruta Ken‐ichi Sugihara Toshiaki Watanabe Yusuke Saitoh Masahiro Igarashi Takashi Toyon | 2015 | Digestive Endoscopy2015，，4： | 2 |
| 13 | Prevalence of hepatitis C virus variants resistant to NS3 protease inhibitors or the NS5A inhibitor (BMS-790052) in hepatitis patients with genotype 1b显示文摘 | Fumitaka Suzuki Hitomi Sezaki Norio Akuta Yoshiyuki Suzuki Yuya Seko Yusuke Kawamura Tetsuya Hosaka Masahiro Kobayashi Satoshi Saito Yasuji Arase Kenji Ikeda Mariko Kobayashi Rie Mineta Sachiyo Watahiki Yuzo Miyakawa Hiromitsu Kumada | 2012 | Journal of Clinical Virology2012，，4： | 2 |
| 14 | Diagnosis of biliary tract and ampullary carcinomas显示文摘 | Kazuhiro Tsukada Tadahiro Takada Masaru Miyazaki Shuichi Miyakawa Masato Nagino Satoshi Kondo Junji Furuse Hiroya Saito Toshio Tsuyuguchi Fumio Kimura Hideyuki Yoshitomi Satoshi Nozawa Masahiro Yoshida Keita Wada Hodaka Amano Fumihiko Miura | 2008 | Journal of Hepato - Biliary - Pancreatic Surgery2008，，1： | 1 |
| 15 | Dehydrogenation of ethylbenzene to styrene over Fe2O3/Al2O3 catalysts in the presence of carbon dioxld显示文摘 | Naoki Mimura and Masahiro Saito | 2000 | Catalysis Today2000，55，12： | 1 |
| 16 | Exten sive screening for edible herbal extracts with potent scavenging activity against superoxide anions显示文摘 | Saito Keita Kohno Masahiro Yoshizaki Fumibiko | 2008 | Plant Foods for Human Nutrition2008，63，2： | 1 |
| 17 | Dehydrogenation of ethylbenzene to styrene over Fe 2O 3/Al 2O 3 catalysts in the presence of carbon dioxide显示文摘 | MIMURA NAOKI SAITO MASAHIRO | 2000 | Catalysis Today2000，55，： | 1 |
| 18 | Dehydrogenation of ethylbenzene over iron oxide-based catalyst in the presence of carbon dioxide显示文摘 | MIMURA NAOKI TAKAHARA I SAITO MASAHIRO | 1998 | Catalysis Today1998，45，： | 1 |
| 19 | Gastric small cell carcinoma with marked response to neoadjuvant chemotherapy显示文摘 | Yasuhiro Nakamura Setsuya Otani Michiro Otaka Tomoyuki Shimada Satsuki Takahashi Masahiro Saito Tohru Takahashi Masahumi Komatsu Toshie Suzuki Shunji Okubo Masato Hayashi Hironobu Sasano | 2005 | International Journal of Clinical Oncology2005，，5： | 1 |
| 20 | Development of high performance raney Cu-based catalysts for methanol synthesis from CO2 and H2显示文摘 | Jamil Toyir Masahiro Saito Isamu Yamauchi | 1998 | Catal Today1998，45，14： | 1 |
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