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World Journal of Gastroenterology 2017年第21期23卷 3928-3933页

作者： Hiromi Tamura Hirotsugu Saiki Takahiro Amano masashi yamamoto Shiro Hayashi Hiroka Ando Reiko Doi Tsutomu Nishida Katsumi yamamoto Shiro Adachi Department of Pathology City Hospital of Toyonaka Department of Gastroenterology JCHO Osaka Hospital Department of Gastroenterology City Hospital of Toyonaka

A case of esophageal carcinoma exclusively composed of adenocarcinoma simulating an esophageal gland duct in a 61-year-old man is presented. The tumor arose as a slightly elevated lesion in the middle intrathoracic esophagus. It was almost completely overlaid with nonneoplastic stratified squamous epithelial cells. Beneath the overlying surface epithelium, an adenocarcinoma that was bilayered in structure diffusely invaded both the mucosal and submucosal layers. Although the tumor consisted exclusively of adenocarcinomatous cells, a keratinizing squamous cell carcinoma component was focally observed. The invasive carcinoma was focally continuous with the small area of the surface squamous epithelial layer, which was confirmed to be neoplastic by immunohistochemistry. Morphological and immunohistochemical examinations suggested that the adenocarcinomatous component arose from the esophageal surface epithelium and clearly differentiated into an esophageal gland duct. It is important to consider the possibility of this type of adenocarcinoma when diagnosing a ductal or glandular lesion of the esophagus in small biopsy specimens.

关键词：食道的腺癌 Bilayered 结构食道的腺管

Clinically diagnosed late-onset fulminant Wilson's disease without cirrhosis: A case report

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World Journal of Gastroenterology 2018年第2期24卷 290-296页

作者： Takahiro Amano Tokuhiro Matsubara Tsutomu Nishida Hiromi Shimakoshi Akiyoshi Shimoda Aya Sugimoto Kei Takahashi Kaori Mukai masashi yamamoto Shiro Hayashi Sachiko Nakajima Koji Fukui Masami Inada Department of Gastroenterology and Hepatology Toyonaka Municipal Hospital

A 64-year-old woman was referred to our hospital with jaundice of the bulbar conjunctiva and general fatigue. After admission, she developed hepatic encephalopathy and was diagnosed with fulminant hepatitis based on the American Association for the Study of Liver Disease(AASLD) position paper. Afterwards, additional laboratory findings revealed that serum ceruloplasmin levels were reduced, urinary copper levels were greatly elevated and Wilson's disease(WD)-specific routine tests were positive, but the Kayser-Fleischer ring was not clear. Based on the AASLD practice guidelines for the diagnosis and treatment of WD, the patient was ultimately diagnosed with fulminant WD. Then, administration of penicillamine and zinc acetate was initiated; however, the patient unfortunately died from acute pneumonia on the 28 th day of hospitalization. At autopsy, the liver did not show a bridging pattern of fibrosis suggestive of chronic liver injury. Here, we present the case of a patient with clinically diagnosed late-onset fulminant WD without cirrhosis, who had positive disease-specific routine tests.

关键词： Wilson’s disease Fulminant hepatitis Lateonset Liver cirrhosis Copper

Impact of time from diagnosis to chemotherapy in advanced gastric cancer: A Propensity Score Matching Study to Balance Prognostic Factors

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World Journal of Gastrointestinal Oncology 2019年第1期11卷 28-38页

作者： Tsutomu Nishida Aya Sugimoto Ryo Tomita Yu Higaki Naoto Osugi Kei Takahashi Kaori Mukai Tokuhiro Matsubara Dai Nakamatsu Shiro Hayashi masashi yamamoto Sachiko Nakajima Koji Fukui Masami Inada Department of Gastroenterology Toyonaka Municipal Hospital

BACKGROUND It is unclear whether treatment delay affects the clinical outcomes of chemotherapy in advanced gastric cancer(A-GC).AIM To assess whether treatment delay affects the clinical outcomes of chemotherapy in A-GC.METHODS This single-center retrospective study examined consecutive patients with A-GC between April 2012 and July 2018. In total, 110 patients with stage Ⅳ A-GC who underwent chemotherapy were enrolled. We defined the wait time(WT) as the interval between diagnosis and chemotherapy initiation. We evaluated the influence of WT on overall survival(OS).RESULTS The mean OS was 303 d. The median WT was 17 d. We divided the patients into early and elective WT groups, with a 2-wk cutoff point. There were 46 and 64 patients in the early and elective WT groups, respectively. Compared with the elective WT group, the early WT group had significantly lower albumin(Alb)levels and higher neutrophil/lymphocyte ratios and C-reactive protein(CRP)levels but not a lower performance status. The elective WT group underwent more combination chemotherapy than did the early WT group. OS was different between the two groups(230 d vs 340 d, respectively). Multivariate analysis revealed that higher CRP levels, lower Alb levels and monotherapy were significantly related to a poor prognosis. To minimize potential selection bias,patients in the elective WT group were 1:1 propensity score matched with patients in the early WT group; no significant difference in OS was found(303 d vs 311 d, respectively, log-rank P = 0.9832).CONCLUSION A longer WT in patients with A-GC does not appear to be associated with a worse prognosis.

关键词： Advanced gastric cancer Waiting time Chemotherapy Prognosis Overall survival

Local advanced rectal cancer perforation in the midst of preoperative chemoradiotherapy:A case report and literature review

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World Journal of Clinical Cases 2017年第1期5卷 18-23页

作者： Nobuhisa Takase Kimihiro Yamashita Yasuo Sumi Hiroshi Hasegawa masashi yamamoto Shingo Kanaji Yoshiko Matsuda Takeru Matsuda Taro Oshikiri Tetsu Nakamura Satoshi Suzuki Yu-Ichiro Koma Masato Komatsu Ryohei Sasaki Yoshihiro Kakeji Division of Gastrointestinal Surgery Department of Surgery Kobe University Graduate School of Medicine Division of Pathology Department of Pathology Kobe University Graduate School of Medicine Division of Diagnostic Pathology Department of Pathology Kobe University Graduate School of Medicine Department of Surgery Hyogo Cancer Center Department of Radiation Oncology Kobe University Graduate School of Medicine

Standard chemoradiotherapy(CRT) for local advanced rectal cancer(LARC) rarely induce rectal perforation. Here we report a rare case of rectal perforation in a patient with LARC in the midst of preoperative CRT. A 56-year-old male was conveyed to our hospital exhibiting general malaise. Colonoscopy and imaging tests resulted in a clinical diagnosis of LARC with direct invasion to adjacent organs and regional lymphadenopathy. Preoperative 5-fluorouracil-based CRT was started. At 25 d after the start of CRT, the patient developed a typical fever. Computed tomography revealed rectal perforation, and he underwent emergency sigmoid colostomy. At 12 d after the surgery, the remaining CRT was completed according to the original plan. The histopathological findings after radical operation revealed a wide field of tumor necrosis and fibrosis without lymph node metastasis. We share this case as important evidence for the treatment of LARC perforation in the midst of preoperative CRT.

关键词： Local advanced rectal cancer Preoperative chemoradiotherapy Rectal perforation 5-fluorouracil Tumor necrosis

Continuous Saccharification of Laminarin by Immobilized Laminarinase ULam111 Followed by Ethanol Fermentation with a Marine-Derived Yeast

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Advances in Microbiology 2017年第5期7卷 387-403页

作者： Daisuke Mitsuya masashi yamamoto Masahiko Okai Akira Inoue Tomohiro Suzuki Takao Ojima Naoto Urano Laboratory of Marine Biochemistry Department of Ocean Sciences Tokyo University of Marine Science and Technology Tokyo Japan Laboratory of Marine Biotechnology and Microbiology Graduate School of Fisheries Sciences Hokkaido University Hakodate Japan

We isolated a novel laminarinase ULam111 from Flavobacterium sp. strain UMI-01. Purified ULam111 showed degradation activity against laminarin with the specific activity of 224 ± 18 U/mg at 30°C and pH 6.0. Its optimum temperature was 50°C, and degradation activities against laminarin were observed at 4°C - 80°C. With a laminarin degradation system, we investigated the preparation and properties of immobilized ULam111 with the use of the 11 types of carriers. The high activity recoveries of immobilized ULam111 were as follows: 19.4% for IB-S60P carrier beads (the non-ionic type), 15.6% for IB-S60S carrier beads (the non-ionic type), 11.9% for IB-150P carrier beads (the covalent type), and 7.1% for IB-C435 carrier beads (the cationic type). With the repeated use of immobilized ULam111, the enzyme activities immobilized on IB-S60S and those on IB-S60P remained at 40% and 30% respectively after the sixth trial. We selected IB-S60S as suitable beads for enzyme immobilization, and we attempted to construct a reactor system with ULam111 immobilized on IB-S60S beads. In this system, 1.2 - 1.9 g/L glucose was repeatedly produced from 30 mg/mL laminarin solutions after 20 hr when the reactor operation was repeated 10 times. We examined ethanol fermentation from the saccharified solutions with a marine-derived yeast (Saccharomyces cerevisiae C-19), and 0.51 - 0.58 g/L bioethanol was produced from the saccharified solution that contained 1.71 - 1.86 g/L of glucose.

关键词： Laminarin Laminarinase β-1 3-Glucanase Immobilization Ethanol Fermentation

Combination of two-hour post-endoscopic retrograde cholangiopancreatography amylase levels and cannulation times is useful for predicting post-endoscopic retrograde cholangiopancreatography pancreatitis

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World Journal of Gastrointestinal Endoscopy 2016年第20期8卷 777-784页

作者： Shiro Hayashi Tsutomu Nishida Hiromi Shimakoshi Akiyoshi Shimoda Takahiro Amano Aya Sugimoto Kei Takahashi Kaori Mukai Tokuhiro Matsubara masashi yamamoto Sachiko Nakajima Koji Fukui Masami Inada Department of Gastroenterology and Hepatology Toyonaka Municipal Hospital

AIM To estimate the efficacy of 2 h post-endoscopic retrograde cholangiopancreatography(ERCP) serum amylase levels and other factors for predicting postERCP pancreatitis.METHODS This was a retrospective,single-center cohort study of consecutive patients who underwent ERCP from January 2010 to December 2013.Serum amylase levels were measured 2 h post-procedure,and patient- and procedure-related pancreatitis(PEP) risk factors wereanalyzed using a logistic model.RESULTS A total of 1520 cases(average age 72 ± 12 years,60% male) were initially enrolled in this study,and 1403 cases(725 patients) were ultimately analyzed after the exclusion of 117 cases.Fifty-five of these cases developed PEP.We established a 2 h serum amylase cutoff level of two times the upper limit of normal for predicting PEP.Multivariate analysis revealed that a cannulation time of more than 13 min [odds ratio(OR) 2.28,95%CI:1.132-4.651,P=0.0210] and 2 h amylase levels greater than the cutoff level(OR=24.1,95%CI:11.56-57.13,P<0.0001) were significant predictive factors for PEP.Forty-seven of the 55 patients who developed PEP exhibited 2 h amylase levels greater than the cutoff level(85%),and six of the remaining eight patients who developed PEP(75%) required longer cannulation times.Only 2 of the 1403 patients(0.14%) who developed PEP did not exhibit concerning 2 h amylase levels or require longer cannulation times.CONCLUSION These findings indicate that the combination of 2 h post-ERCP serum amylase levels and cannulation times represents a valuable marker for identifying patients at high risk for PEP.

关键词： Serum amylase levels Cannulation time Post-endoscopic retrograde cholangiopancreatography pancreatitis Predictor

A new electric field mill array with each of the mill’s rotor controlled precisely by a GPS module:Equipment and initial results

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Earth and Planetary Physics 2024年第2期8卷 423-435页

作者： Kozo Yamashita Hironobu Fujisaka DaoHong Wang Hiroyuki Iwasaki Kazuo yamamoto Koichiro Michimoto masashi Hayakawa Department of Production Systems Engineering and Sciences Komatsu UniversityNu 1-3 Shicho-machiKomatsuIshikawa 923-8511Japan Fujisaka Technology Office 1058-5 Yoshizawa-choOhta-shiGunma 373-0019Japan Department of Electrical Electronic and Computer EngineeringGifu University1-1 YanagidoGifu CityGifu 501-1193Japan Cooperative Faculty of Education Gunma University4-2-Aramaki-machiMaebashiGunma 371-8510Japan Department of Electrical and Electronic Engineering Chubu University1200 Matsumoto-choKasugaiAichi 487-8501Japan Independent Researcher Kosenba Town 2-44-11-406Kawagoe CitySaitama350-0036Japan Advanced Wireless&Communications Research Center The University of Electro-Communications1-5-1 ChofugaokaChofuTokyo 182-8585Japan

We have newly designed an electrostatic sensor,called an electric field mill(EFM),to simplify the estimation of the charge position and charge amount transferred by lightning discharges.It is necessary for this remote estimation of the transferred charge to measure electric field changes caused by charge loss at the time of a lightning strike at multiple locations.For multiple-station measurement of electric field changes,not only speed but also phase for exposure and shielding of the sensing plates inside each EFM of the array should be synchronized to maintain the sensitivities of the deployed instruments.Currently,there is no such EFM with specified speed and phase control performance of the rotary part.Thus,we developed a new EFM in which the rotary mechanism was controlled consistently to within 3%error by a GPS module.Five EFMs had been distributed in the Hokuriku area of Japan during the winter season of 2022-2023 for a test observation.Here we describe the design and a simple calibration method for our new EFM array.Data analysis method based on the assumption of a simple monopole charge structure is also summarized.For validation,locations of assumed point charges were compared with three-dimensional lightning mapping data estimated by radio observations in the MF-HF bands.Initial results indicated the validity to estimate transferred charge amounts and positions of winter cloud-to-ground lightning discharges with our new EFM array.

关键词： lightning electrostatic field electric field mill electric field change

Laparoscopic partial resection for hemangioma in the third portion of the duodenum

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World Journal of Gastroenterology 2014年第34期20卷 12341-12345页

作者： Shingo Kanaji Tetsu Nakamura Masayasu Nishi masashi yamamoto Kiyonori Kanemitu Kimihiro Yamashiita Tatsuya Imanishi Yasuo Sumi Satoshi Suzuki Kenichi Tanaka Yoshihiro Kakeji Department of Gastrointestinal Surgery Faculty of MedicineHyogo 650-0017Japan

Benign duodenal tumors are rare and less commonthan malignant tumors.Furthermore,vascular lesionsof the duodenum,including hemangiomas,are rarecauses of gastrointestinal bleeding.This report describes a case with bleeding hemangiomas in the thirdportion of the duodenum and jejunum and their successful treatment using a laparoscopic approach.Thereis no report of totally laparoscopic resection for tumorin the third portion of duodenum.After performinga laparoscopic Kocher maneuver,the location of theduodenal hemangioma was confirmed by endoscopicand laparoscopic observation.The lesion was excisedusing ultrasonic coagulating shears and the defect inthe duodenal wall was sutured laparoscopically.Thehemangioma of the jejunum was treated extracorporeally through a 3.0 cm umbilical incision.The operatingtime was 241 min and blood loss was negligible.Thepostoperative course was uneventful.For benign duodenal tumors in the third portion,if endoscopic resection is not adapted,this less invasive technique may be a standard treatment.

关键词： Hemangioma Third portion Duodenum Total laparoscop

Effects of thinning on wind damage in Pinus thunbergii plantation ——Based on theoretlcal derlvation of risk—ratios for assessing wind damage

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Journal of Forestry Research 2003年第1期14卷 1-8页

作者： ZHUJiao-jun LIFeng-qin CondaYutaka TakeshiMatsuzaki masashiyamamoto InstituteofAppliedEcology ChineseAcademyofSciencesShenyang110016P.R.China FacultyofAgriculture NiigataUniversityNiiigata950-2181Japan

Based on paper of "Theoretical derivation of risk-ratios for assessing wind damage in coastal forest",wind damage in the pine coasteal forest,which was thinned at four levels in December of 1997,was investigated for four successive growing seasons.Besides wind damage,the wind profiles outside and inside the coastal forest stand and the distributions of optical stratification porosity (OSP) were also observed.Based on these data,risk-ratios of wind damage for both individual trees and stands were estimated according to the methods developed in "Theoretical derivation of risk-ratios for assessing wind damage in a coastal forest".The results showed that risk-ratios of wind damage,which were calculated from the meen height and diameter only and from the combination of wind and stand sructure profiles,accurately predicted wind damage in the plantation.Relationships between different thinning ratios and incidence of wind damage showed that stand stability decreased soon after the thinning.This was due to the immediate effects of thinning on increasing the canopy roughness and wind load,and on decreasing the sheltering effects from surrounding trees.However,thinning strategies could improve the stability by long-term effects on growthand development of trees against extreme wind.Only canopy damage was recorded during the experimental period,no stem damage was found,even though the maximum 10-min wind speed outside the coastal forest attained 30.2m s^-1.The results obtained in this study indicate that thinning is the most effective silvicultural strategy available for managing coastal forest despite the increased probability of wind damage soon after thinning.

关键词：黑松林风害风险系数理论沿海防护林防风效益

Effects of Subcutaneous Closed Suction Drain for the Prevention of Incisional SSI in Patients with Colorectal Perforation

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Surgical Science 2014年第3期5卷 122-127页

作者： Yasuo Sumi Kimihiro Yamashita Kiyonori Kanemitsu Shingo Kanaji masashi yamamoto Tatsuya Imanishi Tetsu Nakamura Satoshi Suzuki Kenichi Tanaka Yoshihiro Kakeji Division of Gastrointestinal Surgery department of SURGERY Kobe University Graduate School of Medicine Kobe Japan

Objective: To determine if a subcutaneous closed suction drain decreases the incidence of wound complications in patients undergoing emergency surgery for colorectal perforation. Materials and Methods: Data on 47 patients who underwent emergency operations for colorectal perforation were examined retrospectively. The clinical features of these cases with or without the use of the J-VACTM Drainage System were examined, and statistical analysis was performed. Results: In these high-risk cases, the overall incidence of incisional surgical site infection (SSI) was 36.2%. The incidence of incisional SSI in these cases with and without the J-VACTM Drainage System was 16.7% and 56.5%, respectively. Conclusion: Our results suggest that a subcutaneous closed suction drain is effective for preventing incisional SSI in patients who have undergone emergency operations for colorectal perforation.

关键词： Surgical Wound Infection Intestinal Perforation Closed Suction Drainage Emergency Operation