Publications by authors named "Ryohei Wada"

Objective: Potential benefit of surgical resection for liver metastasis from gastric cancer (LMGC) remains controversial because most previous studies were retrospective. We evaluated the outcomes of surgical resection following chemotherapy for LMGC in a prospective single-arm multicenter interventional study.

Methods: Patients with synchronous or metachronous LMGC received 2-4 cycles of standard chemotherapy and proceeded to surgical resection if restaging showed a non-progressive disease with a chance of R0 resection.

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Hypothesis: Multicellular convective structures that are induced in a fluid exposed to temperature difference are commonly observed in nature and in daily life. Different types of basic flow patterns are induced in a free liquid film by thermocapillary effect, whereas the formation of such multicellular structures has not been hitherto unravelled.

Experiments: A thin film of high-Prandtl-number liquid is prepared in a rectangular aperture of the order of 0.

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-methyladenine modification (mdA) has recently been identified in eukaryote genomic DNA. The methylation destabilizes the duplex structure when the adenine forms a Watson-Crick base pair, whereas the methylation on a terminal unpaired adenine stabilizes the duplex structure by increasing the stacking interaction. In this study, the effects of mdA modification on the thermal stability of four distinct telomeric G-quadruplex (G4) structures were investigated.

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During the follow‒up of Vater papillary adenoma, a 74‒year‒old man was admitted to our hospital with a chief complaint of upper abdominal pain and diagnosed as cholangitis with obstructive jaundice. Cholestasis had been considered to be caused by papillary adenoma, however, EUS exam showed continuous bile duct wall irregularity from papilla of Vater. So we diagnosed as papillary carcinoma with extension to the distal bile duct.

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Primary duodenal carcinoma is a rare disease among gastrointestinal malignancies and has little evidence. We evaluated retrospectively the treatment status of 16 cases of primary duodenal carcinoma in our hospital between 2010 and 2019. The median age was 72(58-88)years and 63% of patients were male, and Each stage were Stage 0 in 4 cases, Stage Ⅰ in 1 case, Stage ⅢA in 2 cases, Stage ⅢB in 3 cases, and Stage Ⅳ in 6 cases(UICC 8th edition).

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This is the case of a 77-year-old man with hepatitis C. AFP was increased by 95.9 ng/mL, and abdominal computed tomography(CT)revealed a 20 mm mass in the S6 segment of the liver.

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Robot-assisted laparoscopic surgery(RALS)for rectal cancer has been covered by National Health Insurance in Japan since April 2018. We launched RALS in our hospital in October 2019 and now report the short-term results(up to January 2020). Altogether, 15 consecutive patients(12 men, 3 women: median age 70 years)with rectal cancer underwent RALS during that period.

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A phase-Ⅱtrial of TAS-102 plus bevacizumab(Bev)combination therapy showed a progression-free survival(PFS)of 3.7-4.6 months.

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A 70-year-old man visited our hospital because of a body weight loss. Upper gastrointestinal fiberscope revealed a type 3 tumor and an enhanced MRI showed 30 or more liver metastases. He received docetaxel plus cisplatin plus S-1(DCS)therapy.

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A 78-year-old man diagnosed with advanced gastric cancer and para-aortic lymph node metastases at clinical stage cT3 (SS)N1M1(LYN), Stage Ⅳwas treated with S-1/docetaxel(S-1/DTX)therapy. Eight months later, lymph node metastases resolved on abdominal CT, and the primary lesion appeared scarred when viewed by upper gastrointestinal endoscopy; this was considered to be a complete response(CR). S-1/DTX therapy was administered for a total of 16 courses, followed by 13 courses ofS -1 therapy.

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A 61-year-old man with advanced gastric cancer underwent distal gastrectomy after chemotherapy. Fifteen months later, peritoneal metastasis and colon stenosis were detected. Therefore, subtotal colectomy and ileosigmoidostomy were performed.

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A 69-year-old woman was admitted to our hospital because of abdominal pain. Abdominal CT revealed free air, so we performed an emergency operation. Although the perforation site could not be confirmed, pancreatic cancer invading the stomach, spleen, and transverse colon was found.

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Gastroscopy ofa 79-year-old man complaining ofanemia showed a type 3 tumor at the lesser curvature ofthe gastric body. A biopsy revealed poorly differentiated HER2-negative adenocarcinoma. Abdominal CT showed the tumor at the lesser curvature ofthe gastric body, multiple lymph nodes with a maximum diameter of 25mm at the lesser curvature, and a mass measuring 50mm with ring enhancement on S6 ofthe liver.

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The prognosis of pancreatic cancer with superior mesenteric arterial invasion is very poor and judgment of surgical indication is very difficult. We report a case that received multimodal therapy for pancreatic cancer with superior mesenteric arterial invasion. A 43-year-old woman consulted a local doctor because of upper abdominal pain.

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We report 2 cases with long-term survival following stereotactic body radiotherapy(SBRT)for liver metastasis from gastric cancer. Case 1 was a 65-year-old man. We performed distal gastrectomy for gastric cancer with liver metastasis prior to chemotherapy due to pyloric stenosis.

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The efficacy of postoperative chemotherapy for patients with ypStageⅠgastric cancer has not been evaluated. We investigated the characteristics and prognosis of7 patients with ypStage Ⅰgastric cancer. cStages were ⅡA, ⅡB, ⅢB, and Ⅳin 1, 1, 1, and 4 patients, respectively.

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A 69-year-old man was found to have a hepatocellular carcinoma of 2.3 cm in diameter, with extrahepatic growth in liver S4 during follow-up for chronic hepatitis C and liver cirrhosis. We performed a laparoscopic partial liver resection, but the tumor capsule was injured by the retractor used to keep the working space at the bleeding site.

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We experienced a case of multiple esophageal intramural metastasis from adenocarcinoma of the esophagogastric junction. A 58-year-old man was admitted complaining of dysphagia. Upper gastrointestinal endoscopy revealed a type 3 tumor at the esophagogastric junction.

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We report a case of a highly advanced urothelial carcinoma accompanied by duodenal stenosis with pancreaticoduodenectomy. A6 6-year-old man presented with upper abdominal pain and vomiting. Acute pancreatitis and hydronephrosis were diagnosed with urgent hospitalization, but jaundice appeared, and stenosis of the duodenum was also found.

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Erythropoiesis results from a complex combination of the expression of several transcription factor genes and cytokine signaling. However, the overall view of erythroid differentiation remains unclear. First, we screened for erythroid differentiation-related genes by comparing the expression profiles of high differentiation-inducible and low differentiation-inducible murine erythroleukemia cells.

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