Publications by authors named "Umeki Y"

Background: Postoperative pancreatic fistula (POPF) is one of the potentially serious complications after gastrectomy for gastric cancer (GC). Drain amylase level is a predictor of POPF in open and laparoscopic gastrectomy, but no study has focused on minimally invasive surgery (MIS), including robotic gastrectomy (RG). This study assesses the effect of drain amylase levels for POPF in MIS and develop a prediction model in the MIS era.

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Background: Advanced gastric cancer with gastric outlet obstruction (GOO) causes malnutrition and medication adherence issues, leading to a poor prognosis. We developed a novel multimodal, less invasive treatment approach for gastric cancer patients with symptomatic GOO: laparoscopic stomach-partitioning gastrojejunostomy (LSPGJ) combined with neoadjuvant chemotherapy (NAC), followed by minimally invasive gastrectomy with reuse of gastrojejunostomy. This study is a retrospective analysis of the safety and feasibility of our treatment strategy.

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Vegetable and fruit intake has been reported to be associated with decreased risk of cardiovascular disease. To date, however, no study has examined the association between vegetable and fruit intake and LOX-index, which reflects the progression of atherosclerosis and is a predictive biomarker of stroke and coronary heart disease. Here, we examined the cross-sectional association between vegetable and fruit intake and LOX-index in Japanese municipal workers.

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American alligators (Alligator mississippiensis) are apex predators and sentinel species in the coastal wetland ecosystem along the Gulf of Mexico. There is concern for alligator exposure and susceptibility to chemical contaminants due to their high trophic level and lower metabolic capability. At present, their hepatic biotransformation capacity to metabolize or detoxify contaminants has not been comprehensively determined.

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Article Synopsis
  • American alligators are important indicators of environmental health, but their responses to stressors need more research.
  • A new liver perfusion system was created to examine the liver function of juvenile alligators, determining an optimal flow rate for effective study.
  • Results showed that the perfused liver maintained proper function under normal conditions but shifted to anaerobic metabolism when exposed to low oxygen levels, indicating its viability and responsiveness to hypoxia.
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  • - The study assessed the effectiveness of laparoscopic gastrectomy (LG) performed by non-ESSQS-qualified surgeons when guided by ESSQS-qualified surgeons in patients with stage ≤ III gastric cancer.
  • - A total of 1,030 patients were analyzed, with results showing that the 3-year recurrence-free survival rate was slightly higher for non-ESSQS surgeons (84.4%) compared to their ESSQS counterparts (81.7%), indicating non-inferior outcomes.
  • - Overall, both patient groups had similar 5-year recurrence-free survival rates and overall survival rates, suggesting that non-ESSQS-qualified surgeons can achieve comparable oncological results in a high-volume center when receiving intraoperative guidance.
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Concurrent direct and indirect inguinal, femoral, and obturator hernias are rare. This case report describes a rare case treated using the laparoscopic approach. A 68-year-old female patient presented with a moving left inguinal lump and pain.

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Malaria remains a significant global public health concern, with a recent increase in the number of zoonotic malaria cases in Southeast Asian countries. However, limited reports on the vector for zoonotic malaria exist owing to difficulties in detecting parasite DNA in Anopheles mosquito vectors. Herein, we demonstrate for the first time that several Anopheles mosquitoes contain simian malaria parasite DNA using droplet digital PCR (ddPCR), a highly sensitive PCR method.

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Vascular occlusive events are notable adverse effects of tyrosine kinase inhibitors (TKIs), which are promising treatments for chronic myeloid leukemia (CML). We herein report the case of a patient with CML who developed cerebrovascular occlusion of the circle of Willis during TKI treatment. Our patient did not meet the diagnostic criteria for moyamoya disease due to the insignificant development of moyamoya vessels.

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Antioxidant vitamin intake has been reported to be associated with decreased risk of cardiovascular diseases. To date, however, no study has examined the association between antioxidant vitamin intake and LOX-index, a predictive biomarker of cardiovascular disease. We investigated the cross-sectional association between antioxidant vitamin (α-carotene, β-carotene, α-tocopherol, and vitamin C) intake and LOX-index in Japanese municipal workers.

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Article Synopsis
  • The hinotori™ Surgical Robot System, recently approved in Japan, was used for the world’s first robotic gastrectomy for gastric cancer in November 2022, indicating advancements in surgical robot technology.
  • A study involving 24 gastric cancer patients assessed the feasibility and safety of this procedure, focusing on postoperative complications and surgical outcomes.
  • Results showed no severe complications, with most patients experiencing mild issues, and effective surgical performance characterized by low blood loss and significant lymph node dissection.
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The Plasmodium life cycle involves differentiation into multiple morphologically distinct forms, a process regulated by developmental stage-specific gene expression. Histone proteins are involved in epigenetic regulation in eukaryotes, and the histone variant H3.3 plays a key role in the regulation of gene expression and maintenance of genomic integrity during embryonic development in mice.

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  • Laparoscopic gastrectomy (LG) for remnant gastric cancer (RGC) was introduced at a medical institution in 2004, aiming to provide a surgical option for this rare condition despite its clinical variability.
  • A study of 46 patients who underwent LG for RGC showed successful outcomes, including R0 resection, with a low complication rate of 8.7% and promising survival statistics over a median follow-up of 40 months.
  • The findings indicate that LG for RGC is a safe procedure with both short-term and long-term benefits for patients, supporting its use as a viable surgical option.
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Objectives: is the most prevalent sexually transmitted parasite worldwide. However, no surveillance system exists to monitor cases and drug resistance in Japan.

Methods: Cervical cytology vaginal swabs were collected from women with and without suspected symptoms of infection; these swabs were used for the detection of , human papillomavirus (HPV), and using specific polymerase chain reaction.

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  • Chronic active Epstein-Barr virus (CAEBV) infection can lead to severe health issues like hemophagocytic syndrome and lymphoma, primarily due to the uncontrolled growth of infected T or NK cells.* -
  • The case of a 33-year-old man illustrates the challenges in diagnosing Hydroa vacciniforme (HV), where he experienced facial rashes for three years without a clear diagnosis until reevaluation linked his symptoms to CAEBV.* -
  • The study emphasizes the importance of correlating clinical signs to specific EBV tests, urging hematologists to be aware of skin conditions associated with EBV, such as HV and hypersensitivity to mosquito bites.*
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Mixed phenotype acute leukemia (MPAL) is characterized by leukemic blasts that express markers of multiple lineages. Compared with acute myeloid leukemia (AML) and acute lymphoblastic leukemia (ALL), MPAL is considered to have a poor treatment outcome. We report a case of MPAL T/myeloid not otherwise specified that was initially presented as multilineage lymphoblastic lymphoma and subsequently developed into leukemic MPAL.

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A 78-year-old male who had received laparoscopic total gastrectomy for upper gastric cancer 30 months ago(pT3N0, pStage ⅡB)was referred for further treatment for a 30-mm in size mass at the splenic hilum. The mass was suspected of lymph node metastasis was suspected. Two courses of SOX therapy failed to achieve the tumor response.

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A 79-year-old male presented with epigastric discomfort and appetite loss. A type 1 advanced gastric tumor was detected by upper gastrointestinal endoscopy. Contrast-enhanced CT revealed a 7 cm mass with contrast effect at the greater curvature of the lower body of the stomach.

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  • A 46-year-old man discovered a 20 mm submucosal tumor in his stomach during a routine check-up and was suspected to have a gastrointestinal stromal tumor (GIST) after further imaging tests.
  • Robotic surgery was initially planned for a distal gastrectomy due to gastric stricture, but a local resection was performed instead based on intraoperative findings.
  • Post-surgery, the patient recovered well and was discharged on day 9, with a histopathological exam later confirming a granular cell tumor that suggested the robotic technique was effective in assessing the need for stomach resection.
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Objective The aim of this study was to determine the safety and clinical efficacy of docetaxel+cisplatin+5-fluorouracil (DCF) as neoadjuvant chemotherapy (NAC). Methods In this single-center study, patient background and treatment outcomes (NAC efficacy assessment, NAC adverse events, short-term postoperative outcomes, and one-year postoperative outcomes) in patients treated with preoperative DCF and preoperative cisplatin+5-FU (CF) were compared retrospectively. Patients Seventeen patients diagnosed with esophageal squamous cell carcinoma (ESCC) and treated with preoperative DCF therapy and 50 patients treated with preoperative CF therapy between January 2013 and July 2019 were included in this study.

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Tumors comprise diverse cancer cell populations with specific capabilities for adaptation to the tumor microenvironment, resistance to anticancer treatments, and metastatic dissemination. However, whether these populations are pre-existing in cancer cells or stochastically appear during tumor growth remains unclear. Here, we show the heterogeneous behaviors of cancer cells regarding response to anticancer drug treatments, formation of lung metastases, and expression of transcription factors related to cancer stem-like cells using a DNA barcoding and gene expression recording system.

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Article Synopsis
  • Robotic gastrectomy (RG) for gastric cancer became covered by national medical insurance in Japan in April 2018, leading to a significant increase in its use, but safety concerns remain regarding surgeries done by non-qualified surgeons.
  • A study evaluated 30 patients with early-stage gastric cancer who underwent RG by four non-ESSQS-qualified surgeons, adhering to established guidelines, from January 2020 to December 2021.
  • Results showed no serious intraoperative complications, with a median operative time of 413 minutes, and only three patients (10%) had minor postoperative complications, indicating that qualified training can enable safe RG by less-experienced surgeons.
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Background: Esophageal squamous cell carcinoma (ESCC) is a highly malignant neoplasm. DNA-damaging drugs, such as cisplatin (CDDP) and 5-fluorouracil (5-FU), are most frequently used in preoperative chemotherapy for ESCC. However, the response to preoperative chemotherapy varies among patients.

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We report a successful case of robot-assisted surgery for Stage Ⅳ gastric cancer with liver metastasis. A 70s man diagnosed with advanced gastric cancer with S3 solitary liver metastasis, and received a chemotherapy with S-1 and cisplatin. After 4 courses of chemotherapy, liver metastatic lesion was disappeared.

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The infectious protozoan parasite is responsible for amebiasis causing colitis and liver abscesses, which is an epidemic in developing countries. To develop a drug discovery strategy targeting the iron source required for the proliferation of , an untapped chemical group consisting of low-molecular-weight compounds with metal-binding affinity was investigated. Electrochemically neutral polypyridine compounds, PHN-R, that showed specific Fe(II)-binding affinity and growth inhibitory ability against were identified.

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