Publications by authors named "Kei Tamura"

Aim: The aim was to evaluate the impact of previous local ablation (LA) on long-term prognoses and tumor histopathological findings following hepatectomy for hepatocellular carcinoma (HCC).

Methods: This retrospective study used data from patients who underwent initial hepatectomy for HCC at Ehime University Hospital between October 2003 and July 2021. Using data from a total of 234 patients, after excluding patients with distant metastasis or macroscopic residual tumors and patients with mixed HCC, a group of 39 patients who underwent post-ablation liver resection (PALR) was compared with a group of 195 non-PALR patients with respect to patient characteristics, perioperative data, pathological findings, and outcomes.

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Background: Doublesex and mab-3 related transcription factor (DMRT) 1, commonly found in all vertebrates, regulates the transcription of genes involved in the masculinization and maintenance of gonadal somatic cells and/or germline cell development. DMRT1 has a DNA-binding domain called the DM domain and a transcription regulatory region. Unlike the former, there is little knowledge about the latter transcription regulatory region.

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  • The Dokkyo study aimed to evaluate the C-reactive protein-to-albumin ratio (CAR) as a predictor for S-1 chemotherapy tolerance in pancreatic cancer patients following surgery, building on findings from the Ehime study.
  • In a cohort of 172 patients, those who completed S-1 treatment had a significantly lower CAR compared to non-completers, with a CAR cutoff value of 0.05 indicating a higher completion rate.
  • The study confirmed that a higher postoperative CAR is a reliable risk marker for adverse events leading to S-1 non-completion after curative surgery for pancreatic cancer patients.
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In certain tetraploid species resulting from interspecific hybridization, one parent's subgenome is known to selectively undergo DNA loss. The molecular mechanisms behind this remain unclear. In our study, we compared the genomes of a standard diploid species with two allotetraploid species from the Xenopus genus, both possessing L (longer) and S (shorter) homoeologous subgenomes.

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Background: We investigated the relationship between the length of a prophylactic closed-suction drainage tube and clinically relevant postoperative pancreatic fistula (CR-POPF) in distal pancreatectomy (DP).

Materials And Methods: The clinical data of 76 patients who underwent DP using a reinforced stapler for the division of the pancreas at Ehime University Hospital between December 2017 and May 2023 were retrospectively analyzed. Laparoscopic DP was performed in 41 patients (53.

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  • - This study looked at how the shape of the reconstructed portal vein/superior mesenteric vein (PV/SMV) affects long-term nutrition after pancreatic surgery (pancreatoduodenectomy) using a technique called computational fluid dynamics (CFD).
  • - Twenty-four patients who had the surgery and were tumor-free for over 9 months were analyzed by creating 3D models from their CT scans taken 3-6 months post-surgery.
  • - Results showed that patients with higher pressure or turbulence in blood flow were more likely to experience poorer nutritional recovery within 9 months, demonstrating that CFD can help assess the effectiveness of vein reconstructions.
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  • The text discusses a first case of laparoscopic hepatectomy performed on a 76-year-old male patient with von Willebrand Disease (VWD) type 2B, highlighting the complexity of treating individuals with inherited coagulation disorders.
  • The patient had a history of chronic hepatitis C and underwent surgery to remove a 4 cm liver tumor, with unique challenges related to his low platelet count and bleeding risk during the procedure.
  • Post-surgery, the patient experienced complications including hemorrhagic fluid drainage and a detected bleed in the greater omentum, indicating the need for careful monitoring following such operations in similar high-risk patients.
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Background: Immune checkpoint inhibitors (ICIs) have become key agents in the treatment of non-small cell lung cancer worldwide. However, immune-related adverse events (irAEs) must be addressed to maximize the efficacy of ICIs. Mycobacterium tuberculosis (Mtb) infection is considered as a type of irAE associated with ICIs, but the underlying mechanism is not completely understood.

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  • The study examined factors affecting the difficulty of laparoscopic liver resection (LLR), specifically the distance between the tumor and blood vessels.
  • Out of 118 patients studied, 10 (8.5%) required conversion to open surgery, with findings showing that lower platelet counts and closer tumor-vessel proximity (within 10 mm) were significant risk factors.
  • The results identified 10 mm as a critical cutoff distance for predicting conversion, making it an important consideration for improving surgical outcomes in LLR.
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  • * In this case, a 60-year-old male, previously treated for VIPoma, was found to have lymphadenomegaly suggesting rare lymph node metastasis during a routine follow-up CT scan.
  • * The patient underwent a successful lymphadenectomy, marking the first documented case of metachronous lymph node metastasis in someone who had previously undergone surgery for VIPoma, highlighting the importance of ongoing monitoring for recurrence.
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Purpose: Post-transplant biliary stricture (PBS) is a common and important complication following orthotopic liver transplantation (LT). This study clarified the incidence of PBS and identified its risk factors.

Methods: We retrospectively reviewed the medical records of 67 patients who underwent living-donor LT (LDLT) at our institute between June 2010 and July 2022 and analyzed their clinical characteristics, prognosis, and risk factors for PBS.

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Adjuvant chemotherapy (AC) with S-1 after radical surgery for resectable pancreatic cancer (PC) has shown a significant survival advantage over surgery alone. Consequently, ensuring that patients receive a consistent, uninterrupted S-1 regimen is of paramount importance. This study aimed to investigate whether the C-reactive protein-to-albumin ratio (CAR) could predict S-1 AC completion in PC patients without dropout due to adverse events (AEs).

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Aim: The albumin-indocyanine green evaluation (ALICE) score is a useful predictor of post-hepatectomy liver failure (PHLF); however, its usefulness in combination with future liver remnant (FLR), measured by 3-D volumetry, has not been investigated. This study aimed to investigate the relationship between the ALICE of the FLR (ALICE-FLR) score and severe PHLF.

Methods: The clinical data of 215 patients who underwent anatomical hepatectomy for hepatocellular carcinoma without portal vein embolization at two institutes between January 2010 and December 2021 were analyzed retrospectively.

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  • - The study explores the benefits of using the dorsal approach for laparoscopic extended left hemi-hepatectomy, focusing on safely identifying hepatic veins and tumor margins during the procedure.
  • - A methodical surgical technique is described, involving the mobilization and dissection of the liver, which allows for safe isolation and division of critical veins associated with tumor removal.
  • - There were three successful cases of the procedure performed without any complications or conversions to open surgery, highlighting the effectiveness and safety of the dorsal approach.
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Background: Variations in hepatic arteries are frequently encountered during pancreatoduodenecomy. Identifying anomalies, especially the problematic aberrant right hepatic artery (aRHA), is crucial to preventing vascular-related complications. In cases where the middle hepatic artery (MHA) branches from aRHAs, their injury may lead to severe liver ischemia.

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Osteosarcoma is the most common tumour that develops in the chest wall of dogs; an extensive excision is the treatment of choice. Various methods have been reported for reconstruction of chest wall defects following extensive excision. The objective of this report was to describe the complete resection of an extensive costal osteosarcoma with an extended resection of the ribs and part of the diaphragm in a dog.

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Background And Aim: An accurate preoperative diagnosis as the basis for deciding the most appropriate surgical procedure is essential for patients with suspected gallbladder cancer (GBC). The aim of this study was to investigate the usefulness of cell-free DNA (cfDNA) for the preoperative detection of ≥T2 invasion in patients with suspected GBC.

Methods: Twenty-four patients who underwent resection for suspected GBC were enrolled.

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Background: Minimally invasive distal pancreatectomy has become a widely accepted procedure for tumors located in the pancreatic body or tail. However, pancreatic transection by linear stapler is generally avoided for pancreatic body tumors located above the portal vein because the surgical margin width is narrowed after taking into account the cutting allowance for insertion of the stapling device. Herein, we report a parenchymal clamp-crushing procedure that provides a sufficient surgical margin in pancreatic transection.

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Canine primary lung cancer with metastasis has a poor prognosis with no effective treatment. We previously generated a recombinant measles virus (MV) that lost binding affinity to a principal receptor, SLAM, to eliminate its virulence as a new cancer treatment strategy. The virus, rMV-SLAMblind, targets nectin-4, recently listed as a tumor marker, and exerts antitumor activity against nectin-4-positive canine mammary cancer and urinary bladder transitional cell carcinoma cells.

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Background: There is limited information regarding percutaneous transvenous coil embolization (PTCE) for single extrahepatic portosystemic shunt (PSS). This study aimed to describe the procedure and outcome of PTCE in dogs with a single extrahepatic PSS. Forty-two privately owned dogs were included in this study.

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Objectives: Surgery plus adjuvant chemotherapy (AC) for resectable pancreatic ductal adenocarcinoma (PDAC) has been shown to prolong survival compared with surgery alone. Thus, it is of clinical importance that these patients receive a continuous dose of S-1. The aim of this study was to examine whether the geriatric nutritional risk index (GNRI) is a predictor for the completion of S-1 as AC for PDAC.

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BACKGROUND In liver transplantation (LT), preoperative desensitization therapy is considered necessary in patients positive for donor-specific anti-human leukocyte antigen antibodies (DSAs). However, the relationship between DSA intensity and the necessary desensitization therapy is unclear. MATERIAL AND METHODS A total of 37 adult living donor (LD) LTs performed between January 2016 and March 2022 were examined.

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  • * Post-transplant, his health deteriorated rapidly, with complications such as respiratory issues, pleural effusion, and ascites, eventually leading to the discovery of neoplastic lesions and atypical lymphocytes indicative of aggravated lymphoma.
  • * The patient was treated with rituximab but did not respond, resulting in his death 66 days after the transplant, highlighting the need for careful evaluation of elderly transplant candidates who may have undiagnosed EBV-related diseases.
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  • * A computational fluid dynamics (CFD) study was performed on 20 patients (10 with large IVC-RA gaps and 10 with small gaps) to examine how different anatomical features affect blood flow.
  • * Results showed that the median pressure in the middle hepatic vein was significantly higher in patients with a large gap, suggesting that these anatomical variations may contribute to intraoperative bleeding risks.
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