Publications by authors named "Ryuta Muraki"

Article Synopsis
  • The study investigates the role of the neutrophil-to-lymphocyte ratio (NLR) in predicting treatment response and overall survival for patients with advanced pancreatic ductal adenocarcinoma (PDAC) undergoing systemic chemotherapy.
  • A total of 60 patients were analyzed, finding that a baseline NLR of less than 3.10, along with other factors, significantly correlated with better treatment responses and longer survival rates.
  • The findings propose that lower NLR could serve as a valuable prognostic marker to guide treatment decisions and improve outcomes for PDAC patients.
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Background: Median arcuate ligament compression syndrome (MALS) causes upper abdominal pain and at times hemodynamic abnormalities in the pancreaticoduodenal region. Herein, we present a case of a 70 year-old man, initially diagnosed with splenic infarction and was successfully treated laparoscopically.

Case Presentation: A 70-year-old man with abdominal pain admitted to our hospital.

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Tenascin C (TNC) is an extracellular matrix glycoprotein that is highly expressed in cancer stroma and is associated with tumor progression in pancreatic adenocarcinoma (PAAD). In this study, we aimed to investigate the potential involvement of TNC in the response to immune checkpoint inhibitors (ICI) among PAAD patients. Transcriptomic profiles were obtained from public databases and analyzed to compare mRNA levels between tumor and normal tissues.

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Background: Pseudoaneurysm (PA) rupture after pancreaticoduodenectomy (PD) is a life-threatening complication. Most PA cases originate from postoperative pancreatic fistulas (POPFs). Although several risk factors for POPF have been identified, specific risk factors for PA formation remain unclear.

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Background: The usefulness of static monitoring using central venous pressure has been reported for anesthetic management in hepatectomy. It is unclear whether intra-hepatectomy dynamic monitoring can predict the postoperative course. We aimed to investigate the association between intraoperative dynamic monitoring and post-hepatectomy complications.

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Article Synopsis
  • Researchers developed a new diagnostic method for distinguishing malignant cholangiocarcinoma (CCA) from benign conditions using lipid biomarkers found in small extracellular vesicles (sEVs) from bile.
  • A study analyzed bile samples from patients with both malignant and benign diseases, revealing significantly higher levels of phosphatidylcholine (PC) in malignant cases.
  • The diagnostic test showed promising results, with high specificity and moderate sensitivity, suggesting that PC could effectively serve as a marker for detecting CCA in clinical settings.
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Bleeding is a fatal complication after pancreatectomy. Although coil embolization is a widely accepted treatment option, ischemia of the remaining organs should be prevented. This study reports the successful treatment of intra-abdominal hemorrhage following distal pancreatectomy with en bloc celiac axis resection (DP-CAR) using balloon-assisted coil embolization (BACE).

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Background: Staphylococcus hominis (S. hominis) is an opportunistic pathogen that is often highly resistant to antibiotics and is difficult to treat. In patients diagnosed with an adrenocorticotropic hormone (ACTH)-producing tumor that compromises the immune system due to hypercortisolemia, cancer treatment and infection control should be considered simultaneously.

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Background: Various hemostatic devices have been utilized to reduce blood loss during hepatectomy. Nonetheless, a comparison between monopolar and bipolar coagulation, particularly their usefulness or inferiority, has been poorly documented. The aim of this study is to reveal the characteristics of these hemostatic devices.

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Background: Pancreatic juice is constantly activated by contaminated bile in patients with pancreaticobiliary maljunction (PBM). Here, we report a case of laparoscopic distal pancreatectomy for a patient with PBM and sphincterotomized papilla, resulting in fatal pancreatic fistula.

Case Presentation: A 79-year-old man was diagnosed with pancreatic intraductal papillary mucinous neoplasm and common bile duct stones.

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Background/objective: Pancreaticoduodenectomy (PD) is highly invasive with unsatisfactory postoperative complication rates. Nutritional and fluid management after major surgery attracts much attention with regard to the reduction in severe postoperative complications. We retrospectively analyzed PD cases and proposed a novel strategy for perioperative fluid and nutritional therapy according to the risk stratification by pancreatic fistula (PF) and delayed gastric emptying (DGE).

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Background/aim: We sought to identify the mechanisms of perineural invasion in pancreatic ductal adenocarcinoma (PDAC).

Materials And Methods: We utilized in vitro cancer cell-nerve co-culture models comprising human PDAC cell lines (MIA Paca2 and PANC-1) and a dorsal root ganglion (DRG) isolated from neonatal mice. We compared gene expression profiles between cell lines with/without DRG conditioned medium (DRG-CM) using RNA-sequencing (RNA-seq).

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Background: We sought to identify the risk factors of totally implantable central venous access port (TICVAP)-related infections in patients with malignant disease.

Patients And Methods: Overall, 324 consecutive patients who received a TICVAP at our institution were retrospectively analysed. We further analysed cases of TICVAP-related complications.

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Granulocyte colony-stimulating factor (G-CSF) is a glycoprotein which stimulates the proliferation, differentiation, and functional activation of myeloid hematopoietic cells. G-CSF-producing pancreatic cancer is rare and its prognosis is strikingly poor. A 69-year-old woman with well-to-moderately differentiated ductal adenocarcinoma (pT3N0M0, stage IIA) underwent distal pancreatectomy and splenectomy.

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Background: Choroidal malignant melanoma is the most common primary malignant tumor of the eye in adults. Prognosis after recurrence of this disease has been dismal because of the absence of an effective therapy. However, resection of recurrent foci and a subsequent treatment with immune-checkpoint inhibitor may improve the prognosis after recurrence of this disease.

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Serous cystic neoplasms (SCNs) of the pancreas are slow-growing benign tumors. They are mostly monitored without surgical management. Solid SCN is rare and differentiating it from hypervascular tumors of the pancreas using preoperative imaging may be difficult.

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