Publications by authors named "Naoya Tomatsuri"

Article Synopsis
  • Gossypiboma is a rare surgical complication where gauze is unintentionally left inside the body, leading to inflammation and tissue adhesion, often without symptoms for years.
  • * It can be difficult to diagnose preoperatively, as common imaging techniques like ultrasound and CT may not clearly show it, especially when located near the gastrointestinal tract.
  • * The report highlights how endoscopic ultrasound and fine-needle aspiration can be effective for diagnosing gossypiboma before surgery by providing detailed imaging and tissue analysis.
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An 83-year-old male underwent three transgastric punctures with endoscopic ultrasound-guided fine-needle aspiration for the examination of a pancreatic body tumor. After a diagnosis of resectable pancreatic cancer and undergoing distal pancreatectomy, the patient was administered postoperative adjuvant chemotherapy with oral S-1 for 6 months, and carcinoembryonic antigen and carbohydrate antigen 19-9 levels were bimonthly evaluated. Carbohydrate antigen 19-9 levels continually increased to 4638.

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Article Synopsis
  • A 70-year-old man underwent treatment for a large tumor in his colon, diagnosed as intramucosal carcinoma, and experienced a small perforation during endoscopic submucosal dissection.
  • After conservative treatment, he was discharged without further surgery, and no local recurrence was observed for two years.
  • However, two years later, he developed several peritoneal metastases, highlighting the potential risk of tumor spread after small perforations during endoscopic procedures and the importance of careful monitoring afterward.
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Background: The risk of bleeding after gastric endoscopic submucosal dissection (ESD) in antithrombotic agent users has increased, and its management remains a problem. Second-look endoscopy (SLE) following gastric ESD in antithrombotic agent users may be effective in preventing delayed bleeding, but this requires elucidation. Therefore, this study aimed to investigate the efficacy of SLE in reducing bleeding after gastric ESD in patients receiving antithrombotic agents.

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An advanced small bowel mucinous adenocarcinoma with Peutz-Jeghers syndrome was resected, and we started capecitabine plus oxaliplatin (CapeOX) as adjuvant therapy. However, local recurrence was noted, and the tumor increased even after CapeOX plus bevacizumab and fluorouracil plus leucovorin plus irinotecan plus panitumumab (FOLFIRI plus panitumumab). Pembrolizumab was administered after confirming high-frequency microsatellite instability, and the tumor shrank markedly and remained shrunk for 20 months.

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A 59-year-old man was treated for early gastric cancer with endoscopic submucosal dissection (ESD) 10 years prior to the study. Two months after the first ESD, he was diagnosed with recurrence on the ESD scar and treated via ESD again. The horizontal margin could not be evaluated because of cauterization, and the patient was carefully observed.

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A 53-year-old man who had been diagnosed with moderate ulcerative colitis and treated with mesalazine and glucocorticoid steroid was admitted due to fever of unknown origin and diarrhea. Intravenous feeding and treatment with cephem antibiotics were started, but the febrile reaction did not improve at all. Physical examination and various tests showed no specific symptoms, including headache or meningeal irritation.

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Background: Nonalcoholic fatty liver disease is characterized by excessive hepatic fat accumulation. Some individuals frequently present elevated gamma-glutamyl transferase (GGT) levels without fatty liver ultrasound images and other abnormal liver enzymes levels. However, whether these individuals are at an elevated risk for developing fatty liver is unclear.

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Background: Vonoprazan (VPZ) has the potential to prevent delayed bleeding and promote ulcer healing after endoscopic submucosal dissection (ESD) similar to proton pump inhibitors (PPIs).

Objective: We aimed to evaluate the outcomes of VPZ-treated patients after ESD and compared the efficacy and feasibility in preventing a delayed bleeding and in healing an artificial ulcer after ESD between the VPZ and PPI therapies.

Methods: This was a prospective, observation study in 11 Japanese medical institutions.

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Article Synopsis
  • Nivolumab, an antibody treatment targeting PD-1, was approved for advanced gastric cancer patients in Japan after previous chemotherapy regimens.
  • The study of 15 patients showed a 6-month overall survival rate of 67.7% with a median survival time of 6.3 months, while various immune-related adverse events were observed in a small number of patients.
  • The research indicated that baseline absolute lymphocyte counts (ALC) and neutrophil-to-lymphocyte ratios (NLR) could serve as useful markers for predicting treatment outcomes and adverse effects.
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  • A case study describes an 82-year-old man with idiopathic hypereosinophilic syndrome (IHES), revealing multiple low-density liver mass lesions primarily in specific liver segments.
  • Imaging techniques such as CT and contrast-enhanced ultrasonography (CEUS) showed the presence of vascular structures within the lesions and unique enhancement patterns.
  • Remarkably, the patient recovered completely within 11 weeks without any medical treatment, highlighting the unique nature of this IHES case.
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Laparoscopy and endoscopy cooperative surgery(LECS)is an excellent surgical procedure that prevents excessive resection of the gastrointestinal wall and maintains gastrointestinal functions. However, LECS is not recommended for large gastrointestinal stromal tumor(GIST)sized more than 5 cm and/or ulcerative GIST because of the oncological risk of peritoneal dissemination. Here, we report the case of an elderly patient who was successfully treated with LECS-assisted open partial gastrectomy for an ulcerative GIST near the esophagogastric junction.

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Background/aims: This study investigated the effect of Helicobacter pylori eradication therapy on latent digestive symptoms in chronic atrophic gastritis.

Methods: We enrolled 650 health checkup patients who underwent eradication therapy for chronic gastritis and completed a self-report questionnaire before and after the treatment between January 2014 and December 2016 at the Japanese Red Cross Society Kyoto Daiichi Hospital.

Results: H.

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We report a rare case of bile duct stone formation around an ingested fish bone as a nidus after pancreatoduodenectomy. A 78-year-old woman was admitted to our department for fever and epigastric pain. Abdominal computed tomography revealed an elongated bile duct stone containing a linearly shaped foreign body of bone density.

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Background And Aims: In the treatment of patients after endoscopic submucosal dissection (ESD), there is no consensus on the optimum time to start Helicobacter pylori eradication therapy or on whether eradication therapy improves ulcer healing rate after ESD. The aim of this study was to examine the effect of immediate eradication of H. pylori on ulcer healing after ESD in patients with early gastric neoplasms.

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Here, we report our experience with a case of severe biliary bleeding due to a hepatic arterial pseudoaneurysm that had developed 1 year after endoscopic biliary plastic stent insertion. The patient, a 78-year-old woman, presented with hematemesis and obstructive jaundice. Ruptured hepatic arterial pseudoaneurysm was diagnosed, which was suspected to have been caused by long-term placement of an endoscopic retrograde biliary drainage (ERBD) stent.

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Aim: To investigate usefulness of triple therapy with vonoprazan, a potassium ion-competitive acid blocker and antibiotics, for () eradication.

Methods: The eradication rate was examined in 2507 patients (2055 undergoing primary eradication and 452 undergoing secondary eradication, excluding patients with subtotal gastrectomy) at the Japanese Red Cross Kyoto Daiichi Hospital from March 2013 to September 2015. For patients treated from March 2013 to February 2015, a proton pump inhibitor (PPI) was used to reduce acid secretion, while vonoprazan was used after March 2015.

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A 66-year-old man was admitted to our hospital with high fever. We diagnosed a gas-containing liver abscess and performed percutaneous abscess drainage. However, 15 hours after admission, he developed massive intravascular hemolysis and acidosis.

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Background: Endoscopic submucosal dissection (ESD) has become the standard endoscopic treatment for early gastric cancer without lymph node metastasis. At present, undifferentiated type intramucosal cancers without ulcer findings <20 mm in size are often chosen as endoscopic treatment lesions for expanded indication. The purpose of this study was to examine the outcome of ESD treatment in undifferentiated carcinomas.

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The beneficial effects by peroxisome proliferator-activated receptor-γ (PPAR-γ) on gastric injury induced by ischemia-reperfusion have been confirmed, however, the precise mechanism of its cytoprotection is not elucidated thoroughly. The aim of the present study was to determine the gastric localization of PPAR-γ expression in the rat gastric mucosa, and to clarify the mechanism of its cytoprotective properties. The gastric expression of PPAR-γ was confirmed by RT-PCR and western blot, and localized on gastric epithelial cells.

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Background And Aims: MicroRNA (miRNA) are endogenous, approximately 22-nucleotide non-coding RNA that suppress gene expression at post-transcriptional levels by binding to the 3'-untranslated region of specific mRNA targets through base-pairing. It has been recently reported that miRNA have critical functions in key biological processes such as cell proliferation and cell death in various cancer cells. However, the relationship between intestinal inflammation and miRNA expression remains unclear.

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Background: Proton pump inhibitors (PPIs) are effective in healing reflux esophagitis and relieving the symptoms of gastroesophageal reflux disease (GERD). Prevention of recurrence of symptoms has become a therapeutic aim in patients with these conditions.

Aims: We investigated the effects of rebamipide, a mucosal protective anti-ulcer agent, on recurrence of reflux symptoms during PPI maintenance therapy.

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A 64-year-old man was admitted to our hospital with anal pain on evacuation. MRI revealed a large rectal submucosal tumor, more than 6 cm in diameter. Fine needle histological diagnosis indicated GIST with moderate risk.

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Proinflammatory factors, including neutrophil-derived oxygen free radicals and inflammatory cytokines, have recently been implicated in the pathogenesis of reflux esophagitis. Rebamipide has been widely used as an anti-ulcer agent. The aim of the present study was to assess the protective effect of rebamipide against acute reflux esophagitis in rats.

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