Faculty Profiles - MATSUMOTO Kazuyuki

Papers - MATSUMOTO Kazuyuki

Division display 141 - 160 of about 169 ／ All the affair displays >>

Feasibility, efficacy, and predictive factors for the technical success of endoscopic nasogallbladder drainage: a prospective study. International journal

Kei Yane, Hiroyuki Maguchi, Akio Katanuma, Kuniyuki Takahashi, Manabu Osanai, Toshifumi Kin, Ryo Takaki, Kazuyuki Matsumoto, Katsushige Gon, Tomoaki Matsumori, Akiko Tomonari, Masanori Nojima

Gut and liver 9 ( 2 ) 239 - 46 2015.3

Language：English Publishing type：Research paper (scientific journal)

BACKGROUND/AIMS: Several studies have shown the useful-ness of endoscopic nasogallbladder drainage (ENGBD) in patients with acute cholecystitis. However, the procedure is difficult, and factors that affect technical success have not yet been clarified. We conducted a prospective study to eval-uate the technical feasibility, efficacy, and predictive factors for the technical success of ENGBD in patients with acute cholecystitis. METHODS: All patients with moderate or severe acute cholecystitis who were enrolled underwent ENGBD between April 2009 and April 2011. Patients with surgically altered anatomy or pancreatobiliary malignancies were ex-cluded. The primary outcomes included technical success, clinical success, and complications. Factors that could affect the technical success were also examined. RESULTS: Of the 27 patients who underwent ENGBD during the study period, technical success was achieved in 21 (78%) and clinical improvement was achieved in 20 (95%). Early complications were encountered in four patients (15%). Gallbladder wall thickness (odds ratio [OR], 1.64; 95% confidence interval [CI], 1.08 to 2.47) and age (OR, 1.16; 95% CI, 1.00 to 1.35) were effective predictors of technical failure. CONCLUSIONS: ENGBD was effective in resolving acute cholecystitis; however, this modality was technically challenging and had a limited suc-cess rate. Because of technical difficulties, ENGBD should be reserved for limited indications. (Gut Liver, 2015;9239-246).

DOI： 10.5009/gnl14070

PubMed

researchmap

Successful biliary drainage with peroral direct cholangioscopy in a patient with Roux-en-Y hepaticojejunostomy for congenital biliary dilatation. International journal

Kazuyuki Matsumoto, Koichiro Tsutsumi, Yuki Baba, Koji Takemoto, Hirofumi Tsugeno, Shigeatsu Fujiki, Hiroyuki Okada

Endoscopy 47 Suppl 1 UCTN E497-8 2015

Effectiveness of a balloon catheter with a side hole for introducing a guidewire into an infected pancreatic pseudocyst. International journal

Toshifumi Kin, Hiroyuki Maguchi, Akio Katanuma, Kuniyuki Takahashi, Manabu Osanai, Ryo Takaki, Kazuyuki Matsumoto, Katsushige Gon, Tomoaki Matsumori, Akiko Tomonari

Gastrointestinal endoscopy 80 ( 4 ) 725 - 725 2014.10

胆嚢腺筋腫症合併胆嚢癌の特徴

金俊文, 真口宏介, 高橋邦幸, 潟沼朗生, 小山内学, 矢根圭, 高木亮, 松本和幸, 松森友昭, 権勉成, 安保義恭, 篠原敏也

胆道 28 ( 4 ) 633 - 640 2014.10

The efficacy and safety of single-session endoscopic ultrasound-guided fine needle aspiration and endoscopic retrograde cholangiopancreatography for evaluation of pancreatic masses. International journal

Yasuhiro Noma, Hirofumi Kawamoto, Hironari Kato, Masaya Iwamuro, Ken Hirao, Masakuni Fujii, Koichiro Tsutsumi, Shigeru Horiguchi, Naoki Yamamoto, Ichiro Sakakihara, Takeshi Tomoda, Kazuyuki Matsumoto, Hiroyuki Okada, Kazuhide Yamamoto

Hepato-gastroenterology 61 ( 134 ) 1775 - 9 2014.9

Language：English Publishing type：Research paper (scientific journal)

BACKGROUND/AIMS: There have been limited studies evaluating single-session EUS-FNA and ERCP for evaluation of pancreatic masses. The aim of this study was to determine the safety of single-session EUS-FNA and ERCP, and to compare the diagnostic accuracies of cytodiagnosis by EUS-FNA, ERCP, and their combination. METHODOLOGY: A total of 100 patients with pancreatic masses were prospectively enrolled. All patients underwent single-session EUS-FNA and ERCP. The main outcome measurement was frequency of post-procedural complications. Another measurement was diagnostic accuracy of cytodiagnosis by EUS-FNA, ERCP, and their combination. RESULTS: Procedure-related pancreatitis occurred in 10 patients, but all patients were conservatively managed. Cytodiagnosis by EUS-FNA was significantly superior to ERCP in accuracy. In patients with a pancreatic head mass, 3 cases of false negative EUS-FNA were positive on ERCP. The combination procedures improved accuracy compared with EUS-FNA alone. By contrast, in the subgroup of the pancreatic body or tail mass, the combination of EUS-FNA and ERCP did not improve cytodiagnosis compared to that with EUS-FNA alone. CONCLUSIONS: Single-session EUS-FNA and ERCP appears to be as safe as performing each procedure separately. EUS-FNA should be considered the principal procedure for cytodiagnosis. ERCP has only a complementary role in patients with pancreatic head mass.

PubMed

researchmap

Endoscopic management of benign biliary stricture: should we treat more aggressively? International journal

Akio Katanuma, Hiroyuki Maguchi, Kuniyuki Takahashi, Manabu Osanai, Kei Yane, Toshifumi Kin, Kazuyuki Matsumoto, Tomoaki Matsumori, Ryo Takaki, Katsushige Gon, Akiko Tomonari

Digestive endoscopy : official journal of the Japan Gastroenterological Endoscopy Society 26 ( 4 ) 536 - 7 2014.7

Endoscopic removal technique of migrated pancreatic plastic stents.

Kazuyuki Matsumoto, Akio Katanuma, Hiroyuki Maguchi

Journal of hepato-biliary-pancreatic sciences 21 ( 6 ) E34-40 2014.6

Language：English Publishing type：Research paper (scientific journal)

Endoscopic pancreatic stenting (EPS) is used for various pancreatic conditions. With the increasing use of pancreatic stents, many complications have been observed. Especially, proximal stent migration presents a more serious condition because of the possibility of pancreatic duct (PD) damage. However, the removal of proximally migrated stents is technically challenging because of the small PD diameter, the bended PD course, the presence of PD strictures, and the lack of suitable devices for stent removal. Thus, few cases of surgical intervention have been encountered. In this study, we review the endoscopic treatment of proximally migrated pancreatic plastic stents. We classify migrated stent conditions into four types according to stent and PD conditions. In Type A, the main pancreatic duct (MPD) has no stricture. In Type B, the stent is positioned across the stricture on the MPD. In Type C, the stent is positioned further away from the stricture on the MPD. The tip of the proximal stent is located in the MPD in types A thru C. In Type D, the tip of the proximal stent is located in a branch duct. We introduced the strategy of endoscopic removal technique of each type of migrated plastic stents.

DOI： 10.1002/jhbp.94

PubMed

researchmap

Novel tissue harmonic imaging clearly visualizes a case of intraductal papillary mucinous neoplasm with mural nodules. International journal

Kazuyuki Matsumoto, Akio Katanuma

JOP : Journal of the pancreas 15 ( 3 ) 274 - 5 2014.5

Language：English Publishing type：Research paper (scientific journal)

Tissue Harmonic Echo (THE) imaging is a sonographic technique that potentially provides images of higher quality than can conventional B-mode images. Potential advantages of THE imaging include improved resolution, improved signal-to-noise ratio, and reduced artifacts [1, 2]. Recently, a novel THE imaging performed using an EUS system with a monitor/processing unit (EU-ME2 PREMIER PLUS; Olympus Medical Systems, Tokyo, Japan) has been developed. Using this technology, we can obtain two THE mode images, namely, THE-P (penetration) and THE-R (resolution). The THE-P mode is suitable for middle range distance observation because it receives a harmonic signal whose frequency is mainly 7.5 MHz. The THE-R mode is suitable for close distance observation from the probe because it receives a harmonic signal whose frequency mainly ranges from 10 to 12 MHz. Here, we report a case of intraductal papillary mucinous neoplasm (IPMN) with mural nodules which could be clearly detected using this novel THE imaging.

DOI： 10.6092/1590-8577/2385

PubMed

researchmap

Biliary tumor fragment of hepatocellular carcinoma containing lipiodol mimicking a bile duct stone. International journal

Kazuyuki Matsumoto, Manabu Osanai, Hiroyuki Maguchi

Digestive endoscopy : official journal of the Japan Gastroenterological Endoscopy Society 26 ( 2 ) 295 - 6 2014.3

Anti-programmed cell death-1 antibody as a new serological marker for type 1 autoimmune hepatitis. International journal

Kazuyuki Matsumoto, Yasuhiro Miyake, Hiroshi Matsushita, Atsuyuki Ohnishi, Fusao Ikeda, Hidenori Shiraha, Akinobu Takaki, Kazuhiro Nouso, Kazuhide Yamamoto

Journal of gastroenterology and hepatology 29 ( 1 ) 110 - 5 2014.1

Language：English Publishing type：Research paper (scientific journal)

BACKGROUND AND AIM: Recently, the association of the dysfunction of programmed cell death (PD)-1 expressed on activated lymphocytes with the pathogenesis of autoimmune hepatitis (AIH) has been speculated. This study aimed to investigate the association of serum anti-PD-1 antibodies with clinical characteristics of type 1 AIH. METHODS: Serum samples before the initiation of prednisolone treatment were obtained from 52 type 1 AIH patients, 24 patients with drug-induced liver injury (DILI), 30 patients with acute viral hepatitis (AVH), 11 patients with primary sclerosing cholangitis (PSC), and 62 healthy volunteers. Titers of serum anti-PD-1 antibodies were measured by indirect enzyme-linked immunosorbent assay. The cutoff level was represented by a mean absorbance + 2 standard deviations in healthy volunteers. RESULTS: Prevalence of serum anti-PD-1 antibodies was 63% in type 1 AIH patients, 8% in DILI patients, 13% in AVH patients, 18% in PSC patients, and 3% in healthy volunteers. In type 1 AIH patients, titers of serum anti-PD-1 antibodies were correlated with serum levels of bilirubin (r = 0.31, P = 0.030) and alanine aminotransferase (r = 0.31, P = 0.027) but not serum immunoglobulin G levels. Positivity for serum anti-PD-1 antibodies was associated with the later normalization of serum alanine aminotransferase levels after the initiation of prednisolone and the disease relapse. CONCLUSIONS: Serum anti-PD-1 antibodies would be useful for the discrimination of type 1 AIH from DILI, AVH, and PSC as an auxiliary diagnostic marker. Furthermore, anti-PD-1 antibodies may be associated with clinical characteristics of type 1 AIH.

DOI： 10.1111/jgh.12340

PubMed

researchmap

Usefulness of early-phase peritoneal lavage for treating severe acute pancreatitis.

Kazuyuki Matsumoto, Yasuhiro Miyake, Morihito Nakatsu, Tatsuya Toyokawa, Masaharu Ando, Mamoru Hirohata, Hironari Kato, Kazuhide Yamamoto

Internal medicine (Tokyo, Japan) 53 ( 1 ) 1 - 6 2014

Language：English Publishing type：Research paper (scientific journal)

OBJECTIVE: To improve the prognosis of severe acute pancreatitis, preventing infectious complications, particularly infected pancreatic necrosis, is important. The present study evaluated the efficacy of peritoneal lavage for improving the prognosis of patients with severe acute pancreatitis. PATIENTS: We retrospectively reviewed the cases of 23 consecutive patients with severe acute pancreatitis who were treated with peritoneal lavage. RESULTS: Peritoneal lavage was started within 72 hours after the initial onset of symptoms in 20 patients (87%). The duration of peritoneal lavage, which was significantly correlated with the number of prognostic factors according to the revised Japanese criteria, Ranson score and serum C-reactive protein level at the start of peritoneal lavage, was a median of seven (3-22) days. There were no adverse events associated with the peritoneal lavage. Eight patients (35%) concurrently underwent continuous regional arterial infusion. Five days after starting peritoneal lavage, the patients' clinical conditions significantly improved. Overall, the survival rate was 96%. One patient (4%) died due to rupture of a pseudoaneurysm of the splenic artery. Complications occurred in seven patients (30%). Infectious complications were observed in three patients (13%) (one patient developed infected pancreatic necrosis and bacteremia, and two patients developed bacteremia). Pseudocysts and pancreatic fistulas developed in five and one patient, respectively. The incidence of complications was lower in the patients receiving peritoneal lavage within 72 hours from the initial onset of symptoms than in the remaining patients (20% vs. 100%; p=0.005). CONCLUSION: We speculate that peritoneal lavage reduces the mortality and incidence of complications in patients with severe acute pancreatitis.

PubMed

researchmap

A case of delayed bleeding 9 days after endoscopic ultrasound-guided pancreatic pseudocyst drainage. International journal

Tomoaki Matsumori, Akio Katanuma, Hiroyuki Maguchi, Kuniyuki Takahashi, Manabu Osanai, Kei Yane, Toshifumi Kin, Ryo Takaki, Kazuyuki Matsumoto, Katsushige Gon, Akiko Tomonari

Endoscopy 46 Suppl 1 UCTN E245-6 2014

Successful removal of a pancreatic duct stone in a patient with Whipple resection, using a short single-balloon enteroscope with a transparent hood. International journal

Kei Yane, Akio Katanuma, Manabu Osanai, Hiroyuki Maguchi, Kuniyuki Takahashi, Toshifumi Kin, Ryo Takaki, Kazuyuki Matsumoto, Katsushige Gon, Tomoaki Matsumori, Akiko Tomonari

Endoscopy 46 Suppl 1 UCTN E86-7 2014

ENDOSCOPIC BALLOON DILATATION USING A SHORT SINGLE- BALLOON ENTEROSCOPE IN A PATIENT WITH AN ANASTOMOTIC STRICTURE AFTER PANCREATICODUODENECTOMY FOR INTRADUCTAL PAPILLARY MUCINOUS NEOPLASM : A CASE REPORT

YANE Kei, MAGUCHI Hiroyuki, OSANAI Manabu, TAKAHASHI Kuniyuki, KATANUMA Akio, KIN Toshifumi, TAKAKI Ryo, MATSUMOTO Kazuyuki, GON Katsushige, MATSUMORI Tomoaki, TOMONARI Akiko

Gastroenterological Endoscopy 56 ( 3 ) 477 - 483 2014

Language：Japanese Publisher：Japan Gastroenterological Endoscopy Society

A 53-year-old woman had undergone pancreaticoduodenectomy (SSPPD-IIA) for an intraductal papillary mucinous neoplasm (IPMN) in November 2009. Nineteen months after the surgery, abdominal CT showed a dilated remnant main pancreatic duct and a small soft tissue density mass. Findings suggested a pancreaticojejunal anastomosis stricture or a recurrent IPMN. Subsequently, the patient was admitted to our hospital with acute pancreatitis. We tried to observe the pancreaticojejunal anastomosis using a prototype short single-balloon enteroscope (Short SBE). However, the first attempt at ERCP was unsuccessful due to difficulty in finding the anastomotic site. In a second attempt 25 months after the surgery it was possible to find the anastomosis using a Short SBE with a transparent hood. We performed balloon dilatation of the anastomotic stricture and removed white protein plugs. The filling defects in the main pancreatic duct disappeared following pancreatography, and it was decided that there was no apparent tumor recurrence. During the following 14 months, no recurrence of the IPMN or pancreatitis has occurred. ERCP using Short SBE is a useful option for the management of a pancreaticojejunal anastomosis stricture.

DOI： 10.11280/gee.56.477

CiNii Article

researchmap

Other Link： http://search.jamas.or.jp/link/ui/2014178210

Serial changes of serum growth factor levels and liver regeneration after partial hepatectomy in healthy humans. International journal

Kazuyuki Matsumoto, Yasuhiro Miyake, Yuzo Umeda, Hiroshi Matsushita, Hiroaki Matsuda, Akinobu Takaki, Hiroshi Sadamori, Kazuhiro Nouso, Takahito Yagi, Toshiyoshi Fujiwara, Kazuhide Yamamoto

International journal of molecular sciences 14 ( 10 ) 20877 - 89 2013.10

Language：English Publishing type：Research paper (scientific journal)

This study aimed to investigate the associations of the serial changes of serum levels of various growth factors with liver regeneration after hepatectomy in healthy liver donors. Sixteen healthy liver donors who underwent conventional liver resection were included. Serum levels of various growth factors before hepatectomy and on postoperative day (POD) 1, 3, 5 and 7 were measured. Liver volume data calculated by multi-detector computed tomography using workstation. The ratio of remnant liver volume on POD 0 to liver volume before the operation was 51% ± 20%. The ratio of liver volume on POD 14 to liver volume on POD 0 were inversely correlated with remnant liver volume on POD 0 (r = -0.91). The ratio of liver volume on POD 14 to liver volume on POD 0 were significantly correlated with serum hepatocyte growth factor (HGF) levels on POD 1 (r = 0.54), serum leptin levels on POD 1 (r = 0.54), and serum macrophage colony-stimulating factor (M-CSF) levels on POD 5 (r = 0.76) and POD 7 (r = 0.80). These results suggest that early-phase elevation of serum levels of HGF, leptin and M-CSF may be associated with the acceleration of liver regeneration after hepatectomy in humans.

DOI： 10.3390/ijms141020877

PubMed

researchmap

[Two cases of lymphoepithelial cyst of the pancreas confirmed by contrast-enhanced endoscopic ultrasound].

Kazuyuki Matsumoto, Hironari Kato, Takeshi Tomoda, Ichiro Sakakihara, Yasuhiro Noma, Naoki Yamamoto, Takayuki Sonoyama, Koichiro Tsutsumi, Hiroshi Sadamori, Hiroyuki Okada, Takahito Yagi, Kazuhide Yamamoto

Nihon Shokakibyo Gakkai zasshi = The Japanese journal of gastro-enterology 110 ( 10 ) 1823 - 30 2013.10

Language：Japanese Publishing type：Research paper (scientific journal)

We report our experience with two cases of lymphoepithelial cysts (LECs) of the pancreas. Both patients were in their sixties. Contrast-enhanced computed tomography revealed masses in the pancreas with multilocular cystic lesions. Endoscopic ultrasound (EUS) findings presented highly echo-dense structures in the cystic masses; however, contrast-enhanced EUS revealed only the septum inside each mass without enhancing the dense structures. Contrast-enhanced EUS was useful for defining the contents in the cystic lesions; therefore, it may be useful for the diagnosis of LEC.

PubMed

researchmap

造影EUSで観察した膵lymphoepithelial cystの2例

松本和幸, 加藤博也, 友田健, 榊原一郎, 野間康宏, 山本直樹, 園山隆之, 堤康一郎, 貞森裕, 岡田裕之, 八木孝仁, 山本和秀

日本消化器病学会雑誌 110 ( 10 ) 1823 - 1830 2013.10

A case of acute afferent loop syndrome treated by transgastric drainage with EUS. International journal

Kazuyuki Matsumoto, Hironari Kato, Takeshi Tomoda, Ichiro Sakakihara, Naoki Yamamoto, Yasuhiro Noma, Takayuki Sonoyama, Koichiro Tsutsumi, Hiroyuki Okada, Kazuhide Yamamoto, Hirofumi Kawamoto

Gastrointestinal endoscopy 77 ( 1 ) 132 - 3 2013.1

Efficacy, Safety, and Long-Term Follow-Up Results of EUS-Guided Transmural Drainage for Pancreatic Pseudocyst. International journal

Shin Kato, Akio Katanuma, Hiroyuki Maguchi, Kuniyuki Takahashi, Manabu Osanai, Kei Yane, Toshifumi Kim, Maki Kaneko, Ryo Takaki, Kazuyuki Matsumoto, Tomoaki Matsumori, Katsushige Gon, Akiko Tomonari

Diagnostic and therapeutic endoscopy 2013 924291 - 924291 2013

Language：English Publishing type：Research paper (scientific journal)

Background and Aim. EUS-guided transmural drainage (EUS-GTD) is now considered a minimally invasive and effective alternative to surgery for drainage of symptomatic pancreatic pseudocysts. However, the technique is rather difficult, and sometimes serious complications occur to patients undergoing this procedure. We retrospectively evaluated efficacy, safety, and long-term follow-up results of EUS-GTD for pancreatic pseudocyst. Methods. Sixty-seven patients with pancreatic pseudocyst who underwent EUS-GTD from April 2000 to March 2011 were enrolled. We retrospectively evaluated (1) technical success, (2) clinical success, (3) adverse event of procedure, and (4) long-term follow-up results. Results. Total technical success rate was 88%. Ninety-one percent of external drainage, 79% of internal drainage, and 66% of puncture and aspiration only achieved clinical success. There was only one case with an adverse event, perforation (1.5%). The case required emergency operation. Total recurrence rate was 23.9%. Median follow-up period was 33.9 months. The recurrence rates in the cases of stent remaining, spontaneously dislodged, removed on schedule, external tube removal, and aspiration only were 10.0%, 12.5%, 42.9%, 50%, and 0%, respectively. Conclusion. EUS-GTD is a relatively safe and effective therapeutic method. However, further analysis should be done by larger series to determine the method of EUS-GTD for pancreatic pseudocyst.

DOI： 10.1155/2013/924291

PubMed

researchmap

Partial stent-in-stent placement of biliary metallic stents using a short double-balloon enteroscopy. International journal

Koichiro Tsutsumi, Hironari Kato, Takeshi Tomoda, Kazuyuki Matsumoto, Ichiro Sakakihara, Naoki Yamamoto, Yasuhiro Noma, Takayuki Sonoyama, Hiroyuki Okada, Kazuhide Yamamoto

World journal of gastroenterology 18 ( 45 ) 6674 - 6 2012.12

Language：English Publishing type：Research paper (scientific journal)

Endoscopic intervention is less invasive than percutaneous or surgical approaches and should be considered the primary drainage procedure in most cases with obstructive jaundice. Recently, therapeutic endoscopic retrograde cholangiopancreatography (ERCP) using double-balloon enteroscopy (DBE) has been shown to be feasible and effective, even in patients with surgically altered anatomies. On the other hand, endoscopic partial stent-in-stent (PSIS) placement of self-expandable metallic stents (SEMSs) for malignant hilar biliary obstruction in conventional ERCP has also been shown to be feasible, safe and effective. We performed PSIS placement of SEMSs for malignant hilar biliary obstruction due to liver metastasis using a short DBE in a patient with Roux-en-Y anastomosis and achieved technical and clinical success. This procedure can result in quick relief from obstructive jaundice in a single session and with short-term hospitalization, even in patients with surgically altered anatomies.

DOI： 10.3748/wjg.v18.i45.6674

PubMed

researchmap

　 PREV - NEXT 　

< MATSUMOTO Kazuyuki >

Papers - MATSUMOTO Kazuyuki