Keisuke Yonamine
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View article: Incidence and risk factors for recurrence of common bile duct stones in patients undergoing endoscopic extraction without prophylactic biliary stenting and subsequent cholecystectomy: a retrospective study in Japan
Incidence and risk factors for recurrence of common bile duct stones in patients undergoing endoscopic extraction without prophylactic biliary stenting and subsequent cholecystectomy: a retrospective study in Japan Open
The risk of CBDs recurrence after endoscopic extraction during the pre and perioperative periods is high in patients with cystic duct stones. Prophylactic biliary stenting may be considered in high-risk patients.
View article: Dose Performing Multiple Biopsy Strokes From the Same Site Improve Specimen Adequacy in Cholangioscopy‐Guided Mapping Biopsy for Extrahepatic Cholangiocarcinoma?
Dose Performing Multiple Biopsy Strokes From the Same Site Improve Specimen Adequacy in Cholangioscopy‐Guided Mapping Biopsy for Extrahepatic Cholangiocarcinoma? Open
Objectives Cholangioscopy‐guided mapping biopsy (CMB) is performed for preoperative evaluation of extrahepatic cholangiocarcinoma. The aim of this study was to evaluate the usefulness of CMB using a SpyBite Max and to determine the effecti…
View article: High-grade and Invasive Intraductal Papillary Mucinous Neoplasm of the Pancreas with STK11 Aberration Having Undergone Pancreatic Resection Three Times for Metachronous Intrapancreatic Recurrences: A Case Report and Review of the Literature
High-grade and Invasive Intraductal Papillary Mucinous Neoplasm of the Pancreas with STK11 Aberration Having Undergone Pancreatic Resection Three Times for Metachronous Intrapancreatic Recurrences: A Case Report and Review of the Literature Open
A 56-year-old woman with high-grade or invasive intraductal papillary mucinous neoplasm (IPMN) underwent 3 pancreatic surgeries for initial and recurrent IPMN lesions. Immunostaining and genetic analyses of all lesions revealed a consisten…
View article: Predictive factors for the diagnosis of autoimmune pancreatitis using endoscopic ultrasound-guided tissue acquisition: a retrospective study in Japan
Predictive factors for the diagnosis of autoimmune pancreatitis using endoscopic ultrasound-guided tissue acquisition: a retrospective study in Japan Open
Background/Aims: The factors affecting the detection rate of lymphoplasmacytic sclerosing pancreatitis (LPSP) using endoscopic ultrasound-guided tissue acquisition (EUS-TA) in patients with type 1 autoimmune pancreatitis (AIP) have not bee…
View article: Intraductal Papillary Neoplasm of the Bile Duct Occurring 37 Years after Surgery for Congenital Biliary Dilatation
Intraductal Papillary Neoplasm of the Bile Duct Occurring 37 Years after Surgery for Congenital Biliary Dilatation Open
We present the case of a 54-year-old woman who was diagnosed with intraductal papillary neoplasm of the bile duct (IPNB) in the remnant intrapancreatic bile duct, 37 years after surgery for congenital biliary dilatation. Endoscopic ultraso…
View article: Digital peroral pancreatoscopy to determine surgery for patients who have intraductal papillary mucinous neoplasms of the pancreas with mural nodules
Digital peroral pancreatoscopy to determine surgery for patients who have intraductal papillary mucinous neoplasms of the pancreas with mural nodules Open
Background and study aims Because more than a few patients have intraductal papillary mucinous neoplasms of the pancreas (IPMNs) with mural nodules (MNs) that are benign, clinical plans should be determined by using histocytological specim…
View article: Prophylactic endoscopic transpapillary gallbladder stenting to prevent acute cholecystitis induced after metallic stent placement for malignant biliary strictures: a retrospective study in Japan
Prophylactic endoscopic transpapillary gallbladder stenting to prevent acute cholecystitis induced after metallic stent placement for malignant biliary strictures: a retrospective study in Japan Open
Background/Aims: Endoscopic biliary drainage using self-expandable metallic stents (SEMSs) for malignant biliary strictures occasionally induces acute cholecystitis (AC). This study evaluated the efficacy of prophylactic gallbladder stents…
View article: Plain Computed Tomography for Differentiating Neoplastic and Non-neoplastic Pedunculated Gallbladder Polyps
Plain Computed Tomography for Differentiating Neoplastic and Non-neoplastic Pedunculated Gallbladder Polyps Open
Objective Surgery is recommended for large pedunculated gallbladder polyps (PGPs), which measure 10 mm or more in size, because they tend to be neoplastic polyps (NPs), such as adenomas and adenocarcinomas. However, after resection, they a…
View article: Fully covered self‐expandable metallic stents versus plastic stents for preoperative biliary drainage in patients with pancreatic head cancer and the risk factors for post‐endoscopic retrograde cholangiopancreatography pancreatitis
Fully covered self‐expandable metallic stents versus plastic stents for preoperative biliary drainage in patients with pancreatic head cancer and the risk factors for post‐endoscopic retrograde cholangiopancreatography pancreatitis Open
Objectives Optimal stents for preoperative biliary drainage (PBD) for patients with possible resectable pancreatic cancer remain controversial, and risk factors for post‐endoscopic retrograde cholangiopancreatography pancreatitis (PEP), fo…
View article: Diagnostic value of homogenous delayed enhancement in contrast-enhanced computed tomography images and endoscopic ultrasound-guided tissue acquisition for patients with focal autoimmune pancreatitis
Diagnostic value of homogenous delayed enhancement in contrast-enhanced computed tomography images and endoscopic ultrasound-guided tissue acquisition for patients with focal autoimmune pancreatitis Open
Background/Aims: We aimed to investigate (1) promising clinical findings for the recognition of focal type autoimmune pancreatitis (FAIP) and (2) the impact of endoscopic ultrasound (EUS)-guided tissue acquisition (EUS-TA) on the diagnosis…
View article: EUS-guided transluminal drainage for a huge perihepatic biloma covering the right hepatic lobe (with video)
EUS-guided transluminal drainage for a huge perihepatic biloma covering the right hepatic lobe (with video) Open
An 80-year-old woman with acute cholangitis was referred to our hospital due to difficult biliary canulation. Computed tomography (CT) detected a stone with a diameter of 8 mm in the common bile duct (CBD) and a perihepatic biloma in the r…
View article: Pancreatic duct lavage cytology combined with a cell-block method for patients with possible pancreatic ductal adenocarcinomas, including pancreatic carcinoma in situ
Pancreatic duct lavage cytology combined with a cell-block method for patients with possible pancreatic ductal adenocarcinomas, including pancreatic carcinoma in situ Open
Background/Aims: This study aimed to clarify the efficacy and safety of pancreatic duct lavage cytology combined with a cell-block method (PLC-CB) for possible pancreatic ductal adenocarcinomas (PDACs).Methods: This study included 41 patie…
View article: Prospective feasibility study on the efficacy and safety of a novel spiral dilator for endoscopic ultrasound‐guided drainage
Prospective feasibility study on the efficacy and safety of a novel spiral dilator for endoscopic ultrasound‐guided drainage Open
Objectives A difficult step in endoscopic ultrasound (EUS)‐guided drainage procedures is dilation of the puncture tract before stent deployment. The efficacy and safety of a novel spiral dilator, Tornus ES, for EUS‐guided drainage were inv…
View article: Treatment Strategy for Acute Cholecystitis Induced by a Metallic Stent Placed in Malignant Biliary Strictures: Role of Percutaneous Transhepatic Gallbladder Aspiration
Treatment Strategy for Acute Cholecystitis Induced by a Metallic Stent Placed in Malignant Biliary Strictures: Role of Percutaneous Transhepatic Gallbladder Aspiration Open
Objective The present study evaluated the strategic role of percutaneous transhepatic gallbladder aspiration (PTGBA) for acute cholecystitis (AC) induced by a metallic stent (MS) placed in a malignant biliary stricture in comparison with p…
View article: Endoscopic ultrasound (EUS)-guided antegrade intervention for a hepaticojejunostomy anastomosis obstruction under peroral cholangioscopy via an EUS-guided hepaticogastrostomy route
Endoscopic ultrasound (EUS)-guided antegrade intervention for a hepaticojejunostomy anastomosis obstruction under peroral cholangioscopy via an EUS-guided hepaticogastrostomy route Open
A 47-year-old man who had undergone subtotal stomach-preserving pancreatoduodenectomy presented with recurrent cholangitis, possibly due to a hepaticojejunostomy anastomosis (HJA) stricture ([Fig. 1]). Endoscopic retrograde cholangiopancre…
View article: Pancreatic Ductal Adenocarcinoma Concomitant with Main Duct Type Intraductal Papillary Mucinous Neoplasm of the Pancreas: A Case Report
Pancreatic Ductal Adenocarcinoma Concomitant with Main Duct Type Intraductal Papillary Mucinous Neoplasm of the Pancreas: A Case Report Open
BACKGROUND Intraductal papillary mucinous neoplasm of the pancreas (IPMN) and pancreatic ductal adenocarcinoma (PDAC) often coexist in the same pancreas. Almost all IPMNs involving PDACs concomitant with IPMN have been shown to be branch d…
View article: A small solid-pseudopapillary neoplasm with atypical ultrasound images
A small solid-pseudopapillary neoplasm with atypical ultrasound images Open
症例は47歳,男性.他院健診の腹部超音波にて脾門近傍に腫瘤性病変を指摘され当院紹介となった.造影CT検査では膵尾部に15mm大の内部に点状の石灰化を伴う遅延性濃染を示す腫瘤を認めた.MRIではT1WIでやや低信号,T2WIでやや高信号を示した.EUSでは内部を中心として大部分が高エコー,周囲が低エコーを示す腫瘤を認めた.超音波内視鏡下穿刺吸引法を施行し,HE染色では偽乳頭状構造を認めたが,免疫染色ではβ-カテニンは核内陰性でsolid-pseudopapillaly neo…
View article: Safety and Recipient Satisfaction of Propofol Sedation in Outpatient Endoscopy: A 24-Hour Prospective Investigation Using a Questionnaire Survey
Safety and Recipient Satisfaction of Propofol Sedation in Outpatient Endoscopy: A 24-Hour Prospective Investigation Using a Questionnaire Survey Open
Propofol sedation was found to be safe-without severe adverse events or accidents-for outpatient endoscopy on the basis of the patients' next-day self-evaluation. Given the high satisfaction level, propofol sedation might be an ideal tool …
View article: Peroral Cholangioscopy-guided Electrohydraulic Lithotripsy with a SpyGlass DS Versus a Conventional Digital Cholangioscope for Difficult Bile Duct Stones
Peroral Cholangioscopy-guided Electrohydraulic Lithotripsy with a SpyGlass DS Versus a Conventional Digital Cholangioscope for Difficult Bile Duct Stones Open
Objective Recently, a new digital peroral cholangioscopy (POCS) system, the SpyGlass DS (SpyDS), has been used for POCS-guided lithotripsy for difficult bile duct stones (DBDSs). The aim of this retrospective study was to compare the effic…
View article: Inside Plastic Stents versus Metal Stents for Treating Unresectable Malignant Perihilar Biliary Obstructions: A Retrospective Comparative Study
Inside Plastic Stents versus Metal Stents for Treating Unresectable Malignant Perihilar Biliary Obstructions: A Retrospective Comparative Study Open
Time to RBO after iPS placement was significantly longer than that after MS placement. IPSs, which are removable, unlike MSs, were an acceptable option.
View article: Long-term Outcomes of Endoscopic Papillary Large-balloon Dilation for Common Bile Duct Stones
Long-term Outcomes of Endoscopic Papillary Large-balloon Dilation for Common Bile Duct Stones Open
Objective Endoscopic papillary large-balloon dilation (EPLBD) for common bile duct (CBD) stone removal has been confirmed to be safe and effective in the short term. The long-term outcomes of EPLBD, which have not been sufficiently evaluat…
View article: Predictive Value of Localized Stenosis of the Main Pancreatic Duct for Early Detection of Pancreatic Cancer
Predictive Value of Localized Stenosis of the Main Pancreatic Duct for Early Detection of Pancreatic Cancer Open
The predictive value of FiCE for pancreatic cancer prevalence was 47%. Histological confirmation with pancreatic juice cytology is necessary before surgical resection.
View article: A study of 23 cases of infected liver cysts treated at our hospital
A study of 23 cases of infected liver cysts treated at our hospital Open
感染性肝囊胞は比較的稀な疾患とされているが画像診断の進歩により診断する機会が増加しており，当院では2009年から2018年の間に23例を経験した．今回は画像検査の所見と囊胞液の検査結果，治療経過について検討した．腹部超音波検査では22例に囊胞内のスラッジエコーを認め，腹部造影CT検査では5例に囊胞壁の造影効果を認めた．腹部MRI検査を14例に行い全例でT2強調画像での囊胞内部の信号低下を認め，拡散強調画像を追加した12例では囊胞内部や囊胞辺縁の拡散低下を認めた．囊胞液の培養…
View article: Endoscopic Ultrasonography-Guided Gallbladder Drainage as a Treatment Option for Acute Cholecystitis after Metal Stent Placement in Malignant Biliary Strictures
Endoscopic Ultrasonography-Guided Gallbladder Drainage as a Treatment Option for Acute Cholecystitis after Metal Stent Placement in Malignant Biliary Strictures Open
EUS-GBD after MS placement was a feasible option for treating acute cholecystitis. However, it was a rescue technique following the established percutaneous intervention in the current setting because of the immature technical methodology,…
View article: Predictive Factors for Inaccurate Diagnosis of Swollen Lymph Nodes in Endoscopic Ultrasound-Guided Fine Needle Aspiration
Predictive Factors for Inaccurate Diagnosis of Swollen Lymph Nodes in Endoscopic Ultrasound-Guided Fine Needle Aspiration Open
The lymph node size of <16 mm was the only independent factor associated with inaccurate EUS-FNA diagnosis of swollen lymph nodes.
View article: Peroral cholangioscopy by SpyGlass DS versus CHF-B260 for evaluation of the lateral spread of extrahepatic cholangiocarcinoma
Peroral cholangioscopy by SpyGlass DS versus CHF-B260 for evaluation of the lateral spread of extrahepatic cholangiocarcinoma Open
Background and study aims A newly developed peroral cholangioscopy (POCS) system, SpyGlassDS has high maneuverability. This study aimed to evaluate acceptability of the accuracy of SpyGlassDS accompanied by simultaneous POCS-guided biopsy …