Publications by authors named "Saji H"

Background: Complex segmentectomy for uniportal video-assisted thoracoscopic surgery (VATS) remains controversial due to procedural complexity and the risk of increased complications, unlike multiportal VATS. Demonstrating the perioperative results and proficiency of individual surgeon is believed to influence future dissemination for uniportal VATS. In this study, we aimed to compare the perioperative outcomes and learning curves of complex versus simple segmentectomy for uniportal VATS.

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  • Co-infections with multiple HPV genotypes in Japan are linked to increased sexual activity, with a study analyzing data from 8,128 women under 40 diagnosed with cervical abnormalities from 2012 to 2023.
  • Significant declines in multiple HPV infections were observed across different categories of cervical disease (CIN1/2, CIN3/AIS, ICC) over the past decade.
  • The study suggests that this decline may correlate with reduced sexual activity among Japanese women, as indicated by a survey of sexual behavior showing a strong link between the number of sexual partners and increased HPV infections.
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A few studies have reported on the variability of the variant allele frequency (VAF) of gene mutations and the relationship between VAF and the therapeutic effect of molecular-targeted drugs. This joint study was conducted from May 2020 to January 2022 between St. Marianna University School of Medicine and the DNA Chip Research Institute.

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Background: The immunostimulatory actions of innate and adaptive immune responses play a crucial role in the cancer-immunity cycle. Although cervical cancer (CC) exhibits a high recurrence rate, the relation with lymphocytes in the tumor tissue have not been analyzed.

Methods: We analyzed NKT, NK, and T cells, not only in peripheral blood (PB), but also tumor tissue through histological analysis from 23 patients with CC collected before treatment.

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  • The JCOG0802/WJOG4607L trial showed segmentectomy is better than lobectomy for overall survival in small-peripheral non-small-cell lung cancer, but locoregional relapse (LR) is still a concern.
  • An analysis of 1105 patients with various tumor sites determined that factors like solid tumor appearance and close margins significantly increased the risk of LR after segmentectomy.
  • Key findings stress the importance of using thin-section CT scans and ensuring sufficient margin distance to minimize the risk of LR in patients undergoing segmentectomy.
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Background: Endometrial cancer is the most common gynecological malignancy; however, there is no useful blood diagnostic biomarker. This study aimed to determine the utility of tissue factor pathway inhibitor 2 (TFPI2), a biomarker of ovarian cancer, as a diagnostic marker for endometrial cancer.

Methods: We examined serum TFPI2 levels in patients with endometrial cancer (n = 328) compared to those in healthy controls (n = 65) and evaluated the performance of serum TFPI2 levels as a diagnostic marker.

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Aluminum (Al) is environmentally abundant and can harm living organisms in various ways, such as by inhibiting root growth, damaging faunal nervous systems, and promoting tumor cell proliferation. However, the dynamics of Al in living organisms are largely unknown; thus, detecting Al in the environment and organisms is crucial. Fluorescent probes are useful tools for the selective detection of metal ions.

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Bacteriophages Uzumaki and Argan infect B-2880 isolated from soil samples in Long Island, New York. These bacteriophages have lambda-like morphology with prolate capsid and share 97% gene content similarity. These traits place them in cluster AU6 with other related phages.

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Background: The most effective method and length of time for administering adjuvant immunotherapy after surgery for non-small cell lung cancer (NSCLC) are still unknown. Various clinical trials have utilized diverse strategies for adjuvant treatment. In this case, we explore the potential benefits of neoadjuvant immunotherapy combined with chemotherapy in managing locally advanced lung squamous carcinoma, which often poses challenges for treatment.

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  • A study examined the safety of removing chest tubes 6 hours after thoracic surgery using new criteria, focusing on patient outcomes from 2017 to 2023.
  • Out of 942 patients, 244 were eligible for early removal and experienced no adverse events, with shorter hospital stays and fewer complications compared to those with traditional removal.
  • The findings suggest that early chest tube removal is safe for select patients, indicating potential for expanding the criteria for this practice.
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Janeemi is a bacteriophage that infects B-2880, which was isolated from soil collected in New York City. The genome has a length of 43,877 bp and contains 69 predicted genes. Based on gene content similarity to phages in the actinobacteriophage database, Janeemi is assigned to phage cluster AZ1.

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Background: Al exists naturally in the environment and is an important component in acidic soils, which harm almost all plants. Furthermore, Al is widely used in food additives, cosmetics, and medicines, resulting in living organisms ingesting traces of Al orally or dermally every day. Accordingly, Al accumulates in the body, which can cause negative bioeffects and diseases, and this concern is gaining increasing attention.

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  • This study investigates solid-predominant lung adenocarcinoma (SPA), a high-risk cancer subtype with poor treatment responses, focusing on identifying its unique protein co-expression networks using weighted correlation network analysis (WGCNA).
  • Researchers analyzed cancerous cells from different lung adenocarcinoma subtypes, employing mass spectrometry and WGCNA to uncover two significant network modules linked to SPA, particularly related to cell growth and immune responses.
  • Findings highlighted the enriched expression of specific HLA class I molecules and activation of key oncogenic regulators, suggesting a complex interplay between cancer progression and immune response, with notable implications for the SPA subtype's mutation burden and T cell activation.
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  • The JCOG0802/WJOG4607L trial found that segmentectomy led to better overall survival compared to lobectomy in patients with non-small-cell lung cancer (NSCLC) with a pure-solid tumor appearance on CT scans.
  • A post-hoc analysis of 553 eligible patients indicated that segmentectomy was associated with superior survival outcomes, but the reasons for this advantage remain unclear.
  • The study, which involved a median follow-up of 7.3 years, revealed that 5-year overall survival rates were significantly higher for those undergoing segmentectomy compared to lobectomy.
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Objectives: Malnutrition and sarcopenia often co-exist in older patients. This condition, called co-MS, shows a worse prognosis than either condition alone but is often overlooked and undertreated. We aimed to clarify the prevalence of co-MS and its associated factors with a focus on prescription in a long-term nursing care facility in Japan.

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  • The study analyzes lymph node dissection (LND) during segmentectomy for small peripheral non-small cell lung cancer to determine the best practice for optimizing patient outcomes.
  • Among 1056 patients assessed, radiologic findings were the key factor linked to lymph node metastases (LNMs), with part-solid tumors having a significantly lower incidence of LNMs compared to pure-solid tumors.
  • The conclusions suggest selective LND is preferable for patients with pure-solid tumors, while nonadjacent interlobar and mediastinal LNDs are less impactful for those with part-solid tumors.
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Objectives: This study aimed to identify the risk factors for pulmonary functional deterioration after wedge resection for early-stage lung cancer with ground-glass opacity, which remain unclear, particularly in low-risk patients.

Methods: We analysed 237 patients who underwent wedge resection for peripheral early-stage lung cancer in JCOG0804/WJOG4507L, a phase III, single-arm confirmatory trial. The changes in forced expiratory volume in 1 s were calculated pre- and postoperatively, and a cutoff value of -10%, the previously reported reduction rate after lobectomy, was used to divide the patients into 2 groups: the severely reduced group (≤-10%) and normal group (>-10%).

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  • The study evaluated the long-term outcomes of patients with peripheral small ground-glass opacity-dominant lung cancer after sublobar resection, specifically a 10-year follow-up of 333 patients.
  • Of the 314 patients who underwent sublobar resections, the 10-year relapse-free survival rate was 98.6% and overall survival was 98.5%, with only one local recurrence noted.
  • The findings suggest that sublobar resection effectively cures this type of lung cancer, and the occurrence of second cancers among patients is comparable to that of the general Japanese population.
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The purpose of this study was to investigate the associated factors of insulation failure (IF) in reusable endoscopic instruments. The insulation coating of reusable endoscopic instruments underwent routine visual checks, hand washing to remove visible stains, and mechanized sterilization. We recorded the cleaning number and usage period of all instruments.

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Immunoglobulin G4-related disease (IgG4-RD) is a newly recognized disease, and therefore its clinical features are not yet fully understood. Here, we describe a surgical case of metachronous bilateral IgG4-related pleuritis and postoperative chylothorax. This case could provide key insights into the pathology of IgG4-RD from a surgical perspective.

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