Publications by authors named "Shunichi Hamaguchi"

Article Synopsis
  • Older patients (over 75) with severe respiratory failure have a high mortality rate and struggle with daily activities, notably those who are frail.
  • A study at Shimane University Hospital analyzed the outcomes of 32 patients who were intubated and ventilated, comparing frail individuals to self-sufficient ones, finding that 50% of frail patients died compared to 33% of self-sufficient patients.
  • The results highlight the poor prognosis for frail patients, underscoring the need for careful evaluation before initiating intensive care treatments like intubation and ventilation.
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Background: Lung cancer is the leading cause of cancer deaths worldwide. Although lung cancer can metastasize to various organs such as the liver, lymph nodes, adrenal gland, bone, and brain, metastases to the digestive organs, especially the colon, are rare.

Case Summary: An 83-year-old man diagnosed with lung cancer received radiation and chemoimmunotherapy, resulting in a complete clinical response.

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Purpose: In Japan, both a 23-valent pneumococcal polysaccharide vaccine (PPSV23) and a 13-valent pneumococcal conjugate vaccine (PCV13) are available. Although randomized controlled trials have examined the effects of pneumococcal vaccines, few epidemiological studies have investigated the onset of pneumococcal pneumonia in general practice. In Izumo, Shimane Prefecture, Japan, a public subsidy for PPSV23 inoculation began in November 2012.

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Background: Endocytoscopy (ECS) provides a magnification of approximately 450× for real-time observation of lesion nuclei. Using ECS, we aimed to evaluate whether sufficient samples for diagnosis can be obtained during bronchoscopy. We also investigated whether ECS can enable two-class diagnosis of malignant or non-malignant transbronchial biopsy specimens in real-time during bronchoscopy.

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We performed endocytoscopy (ECS) for the ex vivo evaluation of mesothelioma in specimens biopsied during medical thoracoscopy in three patients. We evaluated 19 biopsy specimens based on the density of nuclei and irregularity in the nuclei shape using ECS and compared them with the histopathological findings. All 10 specimens considered malignant based on ECS were diagnosed as malignant based on histopathology.

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The single nucleotide polymorphisms of COX-2 gene, also known as , which encodes a pro-inflammatory factor cyclooxygenase-2, alter the risk of developing multiple tumors, but these findings are not consistent for lung cancer. We previously reported that the homozygous COX-2 -1195A genotype is associated with an increased risk for chronic obstructive pulmonary disease (COPD) in Japanese individuals. COPD is a significant risk factor for lung cancer due to genetic susceptibility to cigarette smoke.

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We report a case of 43-year-old woman diagnosed with essential thrombocythemia in 1992. She was diagnosed with secondary myelofibrosis in 2011. Later, she suffered mild dyspnea, which gradually worsened.

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Article Synopsis
  • - Nivolumab, an immune checkpoint inhibitor, can lead to serious immune-related interstitial lung diseases, as highlighted by a case involving a 44-year-old woman with lung metastases from breast cancer.
  • - The patient underwent various treatments, including an off-label use of nivolumab, followed by T-DM1 therapy, which led to symptoms like fever and hypoxemia, indicating possible drug-induced pneumonia linked to the treatment.
  • - There is no confirmed evidence supporting the effectiveness of nivolumab in treating breast cancer, and its off-label use raises concerns about negative impacts on future treatment options and potential severe side effects.
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Background : Although platinum-combination chemotherapy is widely used to treat advanced non-small cell lung cancer (NSCLC), not all elderly patients benefit from this regimen. In this retrospective study, we aimed to evaluate whether the Glasgow Prognostic Score (GPS), an indicator of systemic inflammation and malnutrition, could predict the tolerability and efficacy of platinum-combination chemotherapy among elderly patients with NSCLC. Methods : The eligibility criteria included patients aged ≥ 70 years with NSCLC treated with first-line platinum-combination chemotherapy at Shimane University Hospital between January 2015 and December 2018.

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Article Synopsis
  • A retrospective study evaluated the effectiveness of a low-dose CT screening program for lung cancer in heavy smokers, covering 25,189 participants over a 10-year period.
  • Lung cancer was found in 82 participants, resulting in a detection rate of 0.33%, with a notable 54.9% of cases occurring in never smokers.
  • The study concluded that while the CT screening program detected lung cancer in both smokers and never smokers, it was not effective for never smokers, indicating a need for further research on its effectiveness in that group.
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Aim: Gefitinib and erlotinib are efficacious and safe for older patients with epidermal growth factor receptor-mutant non-small cell lung cancer. However, prolonged use of epidermal growth factor receptor-tyrosine kinase inhibitors in older patients is difficult, owing to potential adverse events. Hence, dose reduction or treatment discontinuation is often required.

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Purpose: Although there have been many reports on the use of respiratory function tests and questionnaires for creating chronic obstructive pulmonary disease (COPD) questionnaires, there have been no reports on the effectiveness of questionnaires using computed tomography (CT) screening data. We aimed to validate the International Primary Care Airways Group (IPAG) questionnaire and to propose a novel COPD screening questionnaire based on the CT screening data of Japanese participants.

Patients And Methods: Low-dose CT screening was performed for early detection of lung cancer and COPD since 2009 in Shimane, Japan, and clinical information was collected using an original questionnaire that included all the IPAG questionnaire items and eight additional items (for eg, on dyspnea) during CT screening.

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Background/aim: To predict the efficacy of platinum-containing chemotherapy, ERCC1 expression levels were investigated. Studies have shown changes in the performance of anti-ERCC1 antibodies; therefore, predicting chemotherapy efficacy by immunohistochemical assessment of ERCC1 is controversial.

Patients And Methods: Twenty-eight patients who received platinum-containing chemotherapy and underwent computed tomography evaluation 6-9 weeks after therapy initiation were retrospectively identified.

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Background: In Japan, the Ministry of Health, Labour and Welfare population dynamics investigation showed a decrease in the number of deaths related to asthma in recent years. In 2016, the mortality rate was 1.2 deaths per 100,000 population.

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Objective In Japan, both medical oncologists and pulmonologists treat lung cancer patients; however, the difference in their attitude toward palliative care referral is unknown. Thus, we retrospectively investigated the difference in attitudes toward palliative care referral between medical oncologists and pulmonologists in Japan. Methods We retrospectively reviewed the charts of patients with thoracic malignancy who died at Shimane University Hospital between June 2011 and October 2015.

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Background: Multiple synchronous ground glass nodules (GGNs) are known to be malignant, however, they tend to progress slowly. Multiple synchronous lesions in the same patient which show different characteristics must be treated individually.

Methods: This was a retrospective review of 34 lung adenocarcinoma patients with multiple synchronous GGNs in an Asian population.

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Background: Since the computed tomography (CT) findings of nontuberculous mycobacterial lung disease are similar to those of pulmonary tuberculosis (PTB), we often have difficulty differentiating the two. In this study, we compared the differences in chest CT findings and their locations between cases of PTB and Mycobacterium avium complex lung disease (MACLD).

Methods: The subjects were 100 MACLD patients and 42 PTB patients treated at our hospital from May 2005 to August 2015.

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Pulmonary nodular lymphoid hyperplasia (PNLH) involves proliferative lymphatic tissues and is reportedly associated with inflammatory disease or autoimmune disorders. Herein, we describe a case of PNLH with difficult diagnosis because of antibiotics therapy-induced reduction in the abnormal tumour shadow. An 86-year-old man was admitted for persistent cough and bloody sputum.

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Aim: In Japan, the number of older patients with cancer has been increasing. Assessment of performance status, cognitive function and social background is necessary for the treatment of older patients. The aims of the present study were: (i) to establish an evaluation system using electronic medical records; and (ii) to distinguish older patients as fit versus vulnerable or frail according to a geriatric assessment (GA) system score.

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Background: Various procedures for bronchoalveolar lavage (BAL) have been developed. BAL needs a wedge between the bronchoscope and the inner surface of the bronchus. The feasibility of performing BAL at the targeted position cannot be determined until immediately before the procedure.

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Purpose We assessed the efficacy of palonosetron (PAL) in comparison to granisetron (GRA) for the treatment of CINV using the self-assessment questionnaires. In addition, we analyzed the serum levels of emetic various biomarkers. Methods We conducted a randomized study of 70 patients naïve to chemotherapy.

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A 43-year-old man with malignant lymphoma who had been treated with the cyclosphamide, vincrstine, procarbazine, and prednisolone (C-MOPP) regimen was admitted to our hospital with skin eruption. He was diagnosed to have varicella, and treatment with acyclovir and immune globulin was started. Chest computed tomography revealed multiple nodules in the both lung fields.

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The central nervous system is a common site of relapse in patients receiving crizotinib, which is presumed to be associated with the low concentration of crizotinib in the cerebrospinal fluid (CSF). Our patient received surgical treatment for anaplastic lymphoma kinase-positive stage IIA lung adenocarcinoma. His cancer recurred with brain metastases and carcinomatous meningitis.

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Although rare, pleuroparenchymal fibroelastosis (PPFE) is a serious late-onset complication of haematopoietic stem cell transplantation (HSCT). It remains unclear whether graft-versus-host disease (GVHD) is involved in the development of PPFE. We report the case of a patient with PPFE after HSCT.

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Anaplastic lymphoma kinase (ALK)-tyrosine kinase inhibitors (TKIs) dramatically improve progression-free survival compared to cytotoxic agents. It is therefore important to manage patients with ALK-TKIs until drug resistance occurs. Leukocytoclastic vasculitis (LCV) is a rare complication during cancer treatment and is associated with a variety of factors.

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