Publications by authors named "Ko Watanabe"

Article Synopsis
  • Esophageal cancers that penetrate the muscularis mucosa or submucosa can have a risk of lymph node metastasis after endoscopic resection, but the patterns of metastatic recurrence post-treatment are not well-studied.
  • Researchers analyzed data from 220 patients in Japan who received additional treatments (esophagectomy, chemoradiotherapy, or radiation) after endoscopic resection between 2006 and 2017 to identify risk factors for metastatic recurrence.
  • They found that lymphatic invasion is a key risk factor for recurrence, and while both esophagectomy and chemoradiotherapy show similar risks for metastasis, esophagectomy tends to have higher locoregional recurrence but better survival rates for patients who do experience
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Purpose: Drug-induced interstitial lung disease (ILD) is not a rare adverse event in the current chemotherapy strategy for pancreatic ductal adenocarcinoma (PDAC). Thus, we aimed to find the optimal management for PDAC patients with a history of ILD induced by a gemcitabine-based regimen.

Methods: We conducted a multicenter retrospective study.

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Background: The guidelines recommend additional gastrectomy after noncurative endoscopic resection for early gastric cancers (EGCs). However, no additional treatment might be acceptable in some patients aged ≥ 85 years. We aimed to identify this patient group using the data in a highly aged area.

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Background: Although additional treatment is considered for patients with esophageal squamous cell carcinoma (ESCC) invading into the muscularis mucosa (pT1a-MM) or submucosa (pT1b-SM) after endoscopic submucosal dissection (ESD), the actual benefits of this method remain to be elucidated.

Aims: We aimed to evaluate the prognostic benefits of additional treatment in such patients.

Methods: Between 2006 and 2017, we enrolled patients with pT1a-MM/pT1b-SM ESCC after ESD at 21 institutions in Japan.

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Objectives: We aimed to clarify the prognostic factors for patients with esophageal squamous cell carcinoma (ESCC) invading into the muscularis mucosa (pT1a-MM) or submucosa (pT1b-SM) after endoscopic submucosal dissection (ESD).

Methods: This retrospective study enrolled such patients at 21 institutions in Japan between 2006 and 2017. We evaluated 15 factors, including pathological risk categories for ESCC-specific mortality, six non-cancer-related indices, and treatment strategies.

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Purpose: Little is known about the prognostic factors for survival after endoscopic submucosal dissection (ESD) in elderly patients with early gastric cancer (EGC). The aim of this study is to determine prognostic factors and a prediction model of 3-year survival after ESD for EGC in patients aged ≥ 85 years.

Methods: We retrospectively evaluated the clinical outcomes of 740 patients with EGC aged ≥ 85 years, who were treated by ESD at 30 institutions in Japan.

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Background: Pancreaticobiliary cancer (PB Ca) is a lethal disease, and a useful diagnostic marker is urgently needed. A correlation between the human microbiota and malignant gastrointestinal diseases was recently reported.

Aim: To investigate the efficacy of the duodenal microbiota for diagnosing PB Ca.

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The emergence of various types of commercial cameras (compact, high resolution, high angle of view, high speed, and high dynamic range, etc.) has contributed significantly to the understanding of human activities. By taking advantage of the characteristic of a high angle of view, this paper demonstrates a system that recognizes micro-behaviors and a small group discussion with a single 360 degree camera towards quantified meeting analysis.

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Article Synopsis
  • This study investigated the risk of metastatic recurrence in patients with early-stage esophageal squamous cell carcinoma (ESCC) who underwent endoscopic resection (ER) without additional treatment, focusing on two specific tumor invasion types: pT1a-MM and pT1b-SM.
  • Researchers examined data from 593 patients, finding that additional treatment significantly reduced recurrence rates in certain cases, while certain risk factors like lymphatic invasion and positive vertical margins increased the likelihood of recurrence in patients who did not receive extra treatment.
  • The results suggest that close monitoring without additional treatments could be a viable option for selected patients with early-stage ESCC and negative indicators, as most had excellent long-term survival rates
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Methods: Twenty-six patients with UGI-SELs indicated for EUS-FNA were randomly assigned to the dry-first arm using the dry technique for the first two passes or the wet-first arm using the wet technique for the first two passes using a cross-over design with a ratio of 1 : 1. The primary endpoint was the cellularity score of the EUS-FNA specimens rated on a 4-point scale (0-3). The secondary endpoints were the factors influencing cellularity in each suction technique.

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Introduction: Sodium hyaluronate (SH) is a useful submucosal injectant for gastric endoscopic submucosal dissection (ESD). On the other hand, sodium carboxymethylcellulose (SCMC), which has high viscosity, has also been applied clinically. We evaluated the efficacy of SCMC compared to that of SH in gastric ESD.

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A 78-year-old man with a subepithelial lesion (SEL) in the gastric body and two carcinomas in the gastric antrum was referred to our hospital. Following a diagnosis of SEL, the patient was followed-up by esophagogastroduodenoscopy annually for 4 years. Although the SEL had increased in size over the years, histological evaluation of the forceps biopsies did not reveal any significant findings.

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Background: Recently, with the advent of more advanced devices and endoscopic techniques, endoscopic retrograde cholangiopancreatography (ERCP) in Billroth II (B-II) patients has been increasingly performed. However, the procedures are difficult, and the techniques and strategies have not been defined.

Aim: To reveal the appropriate scope for ERCP in B-II patients.

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In this post hoc analysis of the Denosumab Fracture Intervention Randomized Placebo-Controlled Trial (DIRECT) in Japanese postmenopausal women and men with osteoporosis, we evaluated the relationship between vertebral fracture risk and both bone mineral density (BMD) T-score and percent change after 24 months of denosumab treatment at total hip, femoral neck, and lumbar spine. Logistic regression analysis was performed and the proportion of treatment effect explained by BMD in vertebral fracture risk was estimated. The results demonstrate that both total hip BMD T-score and change can be strong predictors of subsequent fracture risk, and that total hip BMD change explained 73%, while T-score explained 23%, of the treatment effect.

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Introduction: In patients with intramucosal gastric cancer (MGC) who have undergone endoscopic submucosal dissection (ESD), lymphovascular invasions (LVIs) such as lymphatic invasion or venous invasion are considered risk factors of lymph node metastasis (LNM). However, the rate of LNM in MGCs with LVI and their clinicopathological features are unclear.

Objective: This study aimed to examine the rate of LNM and clinical characteristics of MGCs with LVI as compared to MGCs without LVI and minimally invasive submucosal gastric cancers (mSMGCs) with LVI.

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Background: Other than surgery, endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) is the only procedure for histologically diagnosing autoimmune pancreatitis (AIP). However, adequate specimens are difficult to obtain. Recently, more adequate specimens were reported to be obtained with EUS-FNA with a wet suction technique (WEST) than with conventional EUS-FNA.

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Introduction: Although L-menthol spray application on lesions has been shown to be effective for the endoscopic clarification of early gastric cancer (EGC), the currently available data are all based on subjective evaluations.

Objectives: This study was aimed to objectively evaluate the effectiveness of L-menthol spray for the endoscopic classification of EGC.

Methods: Patients with EGC treated by endoscopic submucosal dissection were included.

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O-Polar ZnO(0001[combining macron]) single crystals and ZnO and Mg-doped ZnO (MgZnO) films which were subsequently deposited on the ZnO crystals by a pulsed laser deposition (PLD) method were electrochemically investigated through the interfaces with ionic liquid (IL) in a vacuum. The sample surfaces were confirmed to be atomically clean and flat by reflection high energy electron diffraction (RHEED) observation, prior to their electrochemical measurements. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were then performed, and the donor density, flat band potential of these ZnO samples, and the electric double layer capacitance at the IL/ZnO interfaces were successfully evaluated.

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Background And Aim: The clinical outcomes of endoscopic submucosal dissection (ESD) for gastric tube cancer (GTC) after esophagectomy remain unclear. The aim of this study was to evaluate the clinical outcomes and safety of ESD for GTC.

Patients And Methods: Twenty GTC lesions in 18 consecutive patients who underwent ESD between February 2008 and June 2018 were included in this retrospective study.

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Background: Biliary ductal cancer (BDC) is a lethal disease; however, diagnosing BDC is challenging. Biliary biopsies are performed to pathologically diagnose BDC, but the appropriate parameters for biliary biopsy [number of biliary biopsies, number of endoscopic retrograde cholangiopancreatography (ERCP) sessions, .] are unknown.

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We report 2 cases of superficial non-ampullary duodenal tumor resected using laparoscopic endoscopic cooperative surgery( LECS). A man in his5 0's underwent screening esophagogastroduodenoscopy. Endoscopy revealed a 0-Ⅱc lesion at the anal side of the papilla of Vater that measured 5 mm.

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A 37-year-old woman was diagnosed by esophagogastroduodenoscopy (EGD) as having a 15-mm subepithelial lesion (SEL) in the gastric body. For 2 years, she experienced epigastric pain and anemia; she then underwent emergency EGD, which revealed a significant morphological change of the lesion. The SEL had a disintegrated tip and its submucosal portion was substantially exposed out of the mucosa, showing an "erect penis like appearance".

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The aim of the present study was to clarify the clinical significance of a novel fibrotic marker, serum Mac-2 binding protein glycosylation isomer (M2BPGi), in non-cirrhotic patients with biliary diseases. Associations between the serum levels of M2BPGi and clinical features (including background disease and laboratory data) were analyzed. A total of 78 patients with biliary disease (32 with biliary cancer and 46 with benign disease) were evaluated, and their clinical features (age, sex and biliary stricture status), serum level of M2BPGi and other serum laboratory data [aspartate aminotransferase (AST), alanine aminotransferase (ALT), γ-glutamyltranspeptidase (γ-GTP), alkaline phosphatase (ALP), total bilirubin (TB), direct bilirubin (DB), c-reactive protein (CRP), carcinoembryonic antigen (CEA) and carbohydrate antigen 19-9 (CA19-9)] were compared.

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Pancreatic ductal adenocarcinoma (PDAC) is characterized by an aggressive course; therefore, it was hypothesized that waiting times during disease management may serve as a prognostic factor for patients with PDAC. Data for all patients with PDAC who received treatment in Fukushima Medical University Hospital were collected. Median disease-free survival and overall survival time were calculated using the Kaplan-Meier method and utilized as cut-off points to divide the patients into 2 groups: A short and a long survival group.

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We describe the first case of a nonhealing duodenal ulcer with perforation after proton beam therapy (PBT) of a liver tumor that was successfully treated endoscopically using polyglycolic acid (PGA) sheets with fibrin glue. A 69-year-old man received PBT for a liver tumor. Esophagogastroduodenoscopy (EGD) 3 months after PBT revealed a duodenal ulcer.

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