Publications by authors named "Kenji Baba"

Introduction: Regional disparities in medical practice between urban and rural areas in Japan represent a critical issue, and extend to the field of surgical education. To address these disparities, we evaluated the effectiveness of simultaneous remote coaching across multiple facilities using a standardized laparoscopic training method.

Methods: A total of 28 trainees from a university hospital and 3 rural hospitals were categorized into remote and on-site coaching groups.

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Dilated cardiomyopathy (DCM) is a progressive myocardial disorder characterized by impaired cardiac contraction and ventricular dilation. However, some patients with DCM improve when experiencing left ventricular reverse remodeling (LVRR). Currently, the detailed association between genotypes and clinical outcomes, including LVRR, particularly among children, remains uncertain.

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Purpose: Recently, several investigators have focused on the clinical significance of osteosarcopenia in malignancies; however, its prognostic impact on patients with gastric cancer after conversion surgery (CS) remains unclear. Therefore, we aimed to investigate sarcopenia, osteopenia, and osteosarcopenia in this patient population.

Methods: We retrospectively analyzed 24 patients with gastric cancer who underwent CS.

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Background: Osteosarcopenia, recognized as a consequence of aging, has garnered attention as a prognostic marker in recent years; however, its clinical significance in esophageal cancer remains uncertain. This study aimed to investigate the impact of osteosarcopenia on esophageal cancer surgery outcomes.

Methods: This retrospective study included patients with advanced esophageal cancer who underwent surgical resection between 2018 and 2021.

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Background: Gallbladder mucocele (GBM) is a common disease in the canine gallbladder. Although the pathogenesis of GBM remains unclear, we recently reported that the excessive accumulation of mucin in the gallbladder is not a result of overproduction by gallbladder epithelial cells (GBECs).

Hypothesis/objectives: Changes in the function of GBECs other than the production of mucin are associated with the pathogenesis of GBM.

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Article Synopsis
  • A study was conducted to evaluate the long-term effects of Cardiosphere-derived cell (CDC) infusion in patients with single ventricle heart disease, focusing on outcomes over an 8-year period.
  • Among 93 patients, those who received CDC infusion experienced a statistically significant reduction in late failure and adverse events compared to control patients, although overall survival rates at 8 years did not significantly differ.
  • The beneficial effects of CDC treatment on survival became more apparent by the 4-year mark, particularly for patients with heart failure, suggesting that CDC infusion may provide sustained clinical advantages over time.
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Background: Aortic-esophageal fistula (AEF) after thoracic endovascular aortic repair (TEVAR) has a high fatality rate and is difficult to treat. Endoluminal vacuum therapy (EVT) has recently appeared and proven to be a useful method for anastomotic leakage.

Case Presentation: A 76-year-old man underwent aortic arch replacement for a stent graft infection after TEVAR.

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Canine haemangiosarcoma (HSA) is a highly aggressive cancer often associated with coagulation abnormalities. Statins, inhibitors of 3-hydroxy-3-methyl-glutaryl-CoA reductase (HMGCR) clinically prescribed for hypercholesterolemia, are also believed to possess antitumour and anticoagulant properties by inhibiting downstream Akt activation. Akt phosphorylation is involved in the mechanism of the antitumour and tissue factor (TF)-lowering effects of statins.

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The objectives were to investigate the clinical characteristics and course of long COVID, defined as the persistence of symptoms at least one month after the onset of COVID-19, in outpatients and to clarify differences in symptoms between SARS CoV-2 mutant strains. Our observational study in a primary care institution in Japan included 1053 patients with long COVID who visited our outpatient clinic between April 2021 and March 2023. Symptom distribution, performance status, and patient background at the time of the first outpatient visit were compared between infectious strains (Delta and before group and Omicron group).

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Acute kidney injury (AKI) due to vitamin D therapy for osteoporosis is encountered in clinical practice, but epidemiological studies are scarce. We aimed to determine the association between AKI and vitamin D therapy and to identify risk factors for AKI using the Japanese Adverse Drug Event Report database. We used reporting odds ratios (RORs) to detect signals and evaluate risk factors using multiple logistic regression analysis.

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Background/aim: The purpose of the present study was to assess the clinical impact of body weight loss (BWL) during chemotherapy in patients with initially unresectable advanced gastric cancer who underwent conversion surgery.

Patients And Methods: This retrospective study included 61 patients with stage IV gastric cancer who underwent conversion surgery after chemotherapy, and body weight changes during chemotherapy were examined. Based on receiver operating characteristic (ROC) curve analysis of body weight change for disease recurrence, the cutoff value of BWL was determined.

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Controlling pulmonary blood flow in patients who have undergone Norwood palliation, especially early postoperatively, is challenging due to a change in the balance of systemic and pulmonary vascular resistance. We applied a combination therapy of clipping and balloon angioplasty for right ventricle-pulmonary artery (RV-PA) shunt to control pulmonary blood flow, but the influence of the combination therapy on the PA condition is uncertain. Retrospectively analysis was conducted of all infants with hypoplastic left heart syndrome who had undergone Norwood palliation with RV-PA shunt at Okayama University Hospital from January 2008 to September 2022.

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Background: Bipolar disorder often emerges from depressive episodes and is initially diagnosed as depression. This study aimed to explore the effects of a prior depression diagnosis on outcomes in patients diagnosed with bipolar disorder.

Methods: This cohort study analyzed data of patients aged 18-64 years who received a new bipolar disorder diagnosis in Japan, using medical claims data from January 2005 to October 2020 provided by JMDC, Inc.

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Canine tumours including urothelial carcinoma, lung adenocarcinoma, mammary gland tumour, squamous cell carcinoma, and melanoma have been identified as causes of death, but effective therapies are limited due to insufficient knowledge of the molecular mechanisms involved. Within the tumour microenvironment, hypoxia activates hypoxia-inducible factor 1α (HIF1α) in tumour cells. High HIF1α expression correlates with enhanced glycolysis and poorer outcomes in human cancers.

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Leadless pacemaker implantation is recognized as safe and effective for treating bradycardia. However, there are limited descriptions of its use in patients with complex anatomical considerations. Here, we present a case detailing the successful implantation of a leadless pacemaker with a tortuous inferior vena cava and a narrow right atrium.

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Article Synopsis
  • The study examines the long-term outcomes of patients with congenitally corrected transposition of the great arteries who underwent different surgical methods, specifically a double switch operation versus an atrial switch with Rastelli operation, over an average follow-up of 12.7 years.
  • Despite a 10% death rate both early and late, survival rates at 10 and 20 years were 86% and 71% respectively, with no significant differences in survival between the two surgical groups.
  • Complications like heart failure and arrhythmias were comparable across groups, but the Rastelli-Senning/Mustard group faced a higher risk of reoperation, and some patients in both groups experienced significant aortic regurgitation.
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Aim: Creation of an overlapped anastomosis using handsewn sutures for common enterotomy is very popular in robotic right colectomy (RRC) with intracorpareal anastomosis (IA). The aim of this study is to present a simple method for constructing a sutureless overlapped anastomosis using a 60 mm linear stapler with a reinforced bioabsorbable material in RRC with IA.

Method: The distal ileum and proximal colon were put in overlapping positions.

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Statins are inhibitors of the mevalonic acid pathway that mediates cellular metabolism by producing cholesterol and isoprenoids and are widely used in treating hypercholesterolaemia in humans. Lipophilic statins, including simvastatin, induce death in various tumour cells. However, the cytotoxic mechanisms of statins in tumour cells remain largely unexplored.

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Background: The anti-programmed death 1 (PD-1) antibody has led to durable clinical responses in a wide variety of human tumors. We have previously developed the caninized anti-canine PD-1 antibody (ca-4F12-E6) and evaluated its therapeutic properties in dogs with advance-staged oral malignant melanoma (OMM), however, their therapeutic effects on other types of canine tumors remain unclear.

Objective: The present clinical study was carried out to evaluate the safety profile and clinical efficacy of ca-4F12-E6 in dogs with advanced solid tumors except for OMM.

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Canine lymphoma is a disease with high morbidity and poor long-term prognosis, despite a high response rate to chemotherapy. In this study, we focused on liquid biopsy, in which small amounts of substances from body fluids were analysed, to determine whether cell-free DNA (cfDNA) in the plasma can be used as a biomarker for lymphoma in dogs. We found that 23 patients with lymphoma had significantly higher cfDNA concentrations than the 12 healthy dogs (median 2360 ng/mL versus 299 ng/mL, p < .

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Transvenous lead extraction has been increasingly recognized as a safe and effective method of lead extraction, but there are only few references for extracting leads migrating outside the heart. We present a successful extraction of a fractured pacemaker lead from the spermatic vein using several approaches and multiple tools.

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Background: Premature mortality, frequent relapse that easily leads to hospitalization, and discontinuous employment are key challenges for the treatment of schizophrenia. We evaluated risk factors for important clinical outcomes (death, hospitalization, resignation, and sick leave from work) in patients with schizophrenia in Japan.

Methods: A nested case-control study was conducted for patients with schizophrenia identified in a Japanese claims database.

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Background/aim: The clinical significance of laparoscopic subtotal gastrectomy (LsTG) with a small remnant stomach remains unclear in patients with gastric cancer, including at an advanced stage. The present study assessed postoperative quality of life (QOL) and survival after LsTG compared with laparoscopic total gastrectomy (LTG).

Patients And Methods: We retrospectively analyzed consecutive patients with gastric cancer who underwent LsTG (n=26) or LTG (n=26).

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Article Synopsis
  • Three patients with Fontan-associated liver disease (FALD) were diagnosed with early hepatocellular carcinoma (HCC) during routine follow-up.
  • The first patient, a 26-year-old female, had a 40 mm HCC and underwent partial hepatectomy followed by transcatheter arterial chemoembolization (cTACE) for recurrence.
  • The other two cases involved a 25-year-old male and a 37-year-old male, who were treated with cTACE and radiofrequency ablation, respectively, demonstrating that regular surveillance with imaging and serum AFP levels can aid in early HCC detection and improve treatment outcomes.
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