Publications by authors named "Yasuhisa Ando"

The diagnosis of gallbladder (GB) lesions relies on imaging findings. Transpapillary cholangioscopy can potentially be used to diagnose GB lesions; however, the images obtained remain unclear. This study aimed to characterize the endoscopic findings of GB lesions.

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Although pancreatic islet transplantation outcomes have improved, further refinements are required to extend the insulin withdrawal period. The present study examined whether intravenous D-allose administration improves insulin secretion when pancreatic islets are transplanted into type 1 diabetes model mice. Alterations in casual blood glucose levels, intraperitoneal glucose tolerance test (IPGGT) results, the number of apoptotic cells in the engrafted cells, and caspase 3, heme oxygenase 1 and nitric oxide synthase 2 () expression in the engrafted cells were examined using the following groups of type 1 diabetic model mice with transplanted pancreatic islets: Mice that received an intravenous injection of D-allose (D-group) and those that received physiological saline as a control (C-group).

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Objective: Limitations are sometimes encountered in the application of laparoscopic cholecystectomy to the treatment of acute cholecystitis. Endoscopic gallbladder stenting (EGBS) has emerged as an additional option. However, the long-term stent patency remains an issue.

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Background: This study aimed to examine postoperative recurrence after curative pancreatic resection following neoadjuvant chemoradiotherapy (NACRT) in patients with resectable (R-) and borderline resectable (BR-) pancreatic ductal adenocarcinoma (PDAC), focusing on its relationship with the standardized uptake value (SUV) on F-fluorodeoxyglucose-positron emission tomography (FDG-PET).

Method: The postoperative initial recurrence patterns were examined in patients with R- and BR-PDAC who underwent NACRT followed by curative pancreatic resection. Data collected from three prospective clinical trials were retrospectively analysed.

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Background/aim: F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) is reportedly associated with the malignant potential of cancer. This study aimed to evaluate the association between FDG accumulation and tumor metabolism in pancreatic ductal adenocarcinoma (PDAC).

Patients And Methods: A prognostic analysis of data from 131 patients with PDAC who underwent FDG-PET/CT before curative-intent pancreatic surgery was performed.

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Subsequent to a medical examination, a 61-year-old male was referred to our hospital with jaundice. He was diagnosed with intrahepatic cholangiocarcinoma involving the hepatic hilum and was referred to our department to undergo a left trisectionectomy of the liver, extrahepatic bile duct resection, and regional lymphadenectomy. He was discharged on postoperative day 39 without liver failure.

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Background: A chronic expanding hematoma is an uncommon entity described as an organized blood collection that increases in size after the initial hemorrhagic event without histological neoplastic features. The standard treatment is complete resection. To our knowledge, this is the first report of a chronic expanding hematoma mimicking a pancreatic cystic tumor that has been successfully resected utilizing a laparoscopic approach.

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We report a case of a patient with distal bile duct cancer who presented with ocular pain and eye redness due to a liver abscess. The patient developed a liver abscess while waiting for surgery. Since Klebsiella pneumoniae with high viscosity was identified and imaging studies showed systemic infection, a diagnosis of klebsiella invasive syndrome was made.

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Article Synopsis
  • * Researchers evaluated 112 patients, focusing on factors like surgical outcomes, nutritional and kidney functions, and overall prognosis over two years.
  • * Although elderly patients had more postoperative complications, the results showed that NACRT followed by PD was safe for them and yielded a prognosis similar to that of younger patients, with certain low prognostic indicators noted for the elderly group.
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Background: Despite a strong association between nutritional indices and disease prognosis, evidence regarding the evaluation of nutritional indices after preoperative treatment for pancreatic ductal adenocarcinoma (PDAC) is insufficient. We evaluated the clinical significance of the prognostic nutritional index (PNI) in patients with resectable (R-) and borderline resectable (BR-) PDAC who received neoadjuvant chemoradiotherapy (NACRT) followed by pancreatic resection.

Methods: We assessed 153 patients with R- and BR-PDAC who underwent NACRT followed by curative resection between 2009 and 2022.

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Background: Clinically relevant postoperative pancreatic fistula (CR-POPF) after pancreatic resection can lead to severe postoperative complications. POPF is defined based on postoperative day (POD) 3 drainage fluid amylase level. POPF correlates with inflammatory parameters as well as drainage fluid bacterial infection.

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Article Synopsis
  • The study evaluated the differences between pancreatic ductal adenocarcinoma (PDAC) located in the head (Ph) versus the body/tail (Pbt) in patients who received neoadjuvant chemoradiotherapy (NACRT) before surgery.
  • It included 107 patients who underwent surgery after NACRT, finding that the Ph group had lower albumin levels and worse immune markers compared to the Pbt group, which had higher rates of certain types of cancer spread.
  • Although the overall and recurrence-free survival rates were similar for both groups, the Pbt group had a significantly higher risk of recurrence via peritoneal dissemination.
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Objective: A significant number of patients experience early recurrence after surgical resection for pancreatic ductal adenocarcinoma (PDAC), negating the benefit of surgery. The present study conducted clinicopathologic and metabolomic analyses to explore the factors associated with the early recurrence of PDAC.

Materials And Methods: Patients who underwent pancreatectomy for PDAC at Kagawa University Hospital between 2011 and 2020 were enrolled.

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Background: Identifying malignant transformation in pancreatic branch-duct intraductal papillary mucinous neoplasms (BD-IPMNs) remains challenging, but the standardized uptake value (SUV) obtained from F-fluorodeoxyglucose-positron emission tomography (FDG-PET)/CT has the potential to become a valuable parameter for differentiation. This study aimed to assess the effectiveness of SUV of FDG-PET/CT in distinguishing low-grade dysplasia (LGD), high-grade dysplasia (HGD), and intraductal papillary mucinous carcinoma (IPMC) within BD-IPMNs.

Methods: We assessed 58 patients with confirmed BD-IPMN undergoing surgery between 2008 and 2022.

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Several studies have recently reported the rare occurrence of internal herniation of the small bowel after laparoscopic colorectal surgery. Most cases of internal herniation after laparoscopic colorectal surgery occur due to a mesenteric defect. However, there have been no reports on the indications for closing mesenteric defects to prevent the development of an internal hernia.

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Background And Aim: To evaluate the efficacy and safety of a grasping-type knife, called Clutch Cutter (CC), for colorectal endoscopic submucosal dissection (C-ESD).

Methods: This was a randomized prospective study. Patients who underwent C-ESD for colorectal neoplasms >20 mm and <50 mm in size were enrolled, dividing into two groups: ESD using needle type of dual knife alone (D-group) and circumferential incision using dual knife followed by submucosal dissection using CC (CC-group).

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Article Synopsis
  • The study investigates the link between gene mutations in patients with pancreatic ductal adenocarcinoma (PDAC) and their clinical outcomes, focusing on mutations in KRAS, P16, TP53, and SMAD4/DPC4.
  • 84 EUS-FNA samples from 43 resectable and 41 borderline resectable PDAC patients were analyzed, revealing significant mutation rates: 73% for p16 and p53, and 45% for Smad4.
  • Findings indicate that abnormal p53 correlates with a decreased chance of tumor resection and early recurrence post-surgery, highlighting the importance of these genetic markers in predicting patient prognosis.
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  • A study analyzed the safety and effectiveness of preoperative treatment combined with surgery in older patients (≥75 years) with pancreatic ductal adenocarcinoma (PDAC) compared to younger patients (<75 years) using data from 122 patients.
  • Results showed that both patient groups had similar treatment completion rates, side effects, and nutritional changes during treatment, indicating that preoperative treatment is feasible for older patients.
  • Key findings revealed that high levels of C-reactive protein/albumin ratio during treatment and the absence of postoperative chemotherapy were significant indicators of poor survival for older patients, despite comparable overall prognosis to younger patients.
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Constrictive pericarditis is a rare condition characterized by clinical signs of right heart failure subsequent to the loss of pericardial compliance. We report a case of constrictive pericarditis due to pericardial metastasis in a patient with a history of esophageal squamous cell carcinoma that had a pathological complete response (pCR) to preoperative chemoradiotherapy. A 66-year-old woman was referred to our division for the treatment of advanced esophageal cancer.

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Objectives: Indications of preoperative treatment for resectable (R-) or borderline resectable (BR-) pancreatic ductal adenocarcinoma (PDAC) are unclear, and the protocol remains to be standardized.

Methods: Included 65 patients with R- and BR-PDAC with venous involvement (V-) received neoadjuvant chemoradiotherapy with S-1 and 50 Gy of radiation as the 5-week regimen. The outcomes of this group were compared with those of 52 patients who underwent S-1 and 30 Gy of radiation as the 2-week regimen, previously collected as our prospective phase II study.

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Objective: We investigated the metabolic changes in pancreatic ductal adenocarcinoma to identify the mechanisms of treatment response of neoadjuvant chemoradiation therapy.

Methods: Frozen tumor and non-neoplastic pancreas tissues were prospectively obtained from 88 patients with pancreatic ductal adenocarcinoma who underwent curative-intent surgery. Sixty-two patients received neoadjuvant chemoradiation therapy and 26 patients did not receive neoadjuvant therapy (control group).

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Article Synopsis
  • A study examined the link between FDG-PET radioactivity reduction and CA19-9 levels with tumor responses and prognosis in pancreatic cancer patients after neoadjuvant chemoradiotherapy (NACRT).
  • Researchers analyzed data from 102 patients who underwent NACRT followed by surgery and found that substantial reductions in FDG-PET uptake and CA19-9 levels correlated with better recurrence-free survival (RFS).
  • The findings suggest that these reductions serve as effective preoperative indicators of tumor response and prognosis, providing reliable predictions for RFS following surgery.
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A 75-year-old woman presented to our department with a liver tumor. She had undergone left total mastectomy and axillary lymph node dissection for left breast cancer at the age of 67 years. Subsequently, she had taken an aromatase inhibitor.

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Article Synopsis
  • - Recent studies show that immune checkpoint inhibitors work well against cancers with defective mismatch repair (dMMR) and high microsatellite instability (MSI-H), but there's limited knowledge about these conditions in biliary tract cancer (BTC).
  • - This study analyzed 116 BTC patients who had surgery at Kagawa University Hospital in Japan from 2008 to 2017, focusing on the frequency and clinical features of dMMR/MSI-H cases.
  • - Out of the patients, 5 (about 4.3%) showed loss of certain mismatch repair proteins; two of those had MSI-H status, indicating that the frequency of dMMR in BTC is around 5%, similar to findings in other countries.
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