Publications by authors named "Katsuro Tomita"

The identification of immune cell profiles (ICP) involved in anti-tumor immunity is crucial for immunotherapy. Therefore, we herein investigated cholangiocarcinoma patients (CCA) who received adoptive T-cell immunotherapy (ATI). Eighteen unresectable or recurrent CCA received ATI of αβ T cells alone or combined with chemotherapy.

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Background Aims: With the aim of strengthening the scientific evidence of immune-cell therapy for cancer and further examining its safety, in October 2015, our hospital jointly established the Cancer Immune-Cell Therapy Evaluation Group (CITEG) with 39 medical facilities nationwide.

Methods: Medical information, such as patients' background characteristics, clinical efficacy and therapeutic cell types obtained from each facility, has been accumulated, analyzed and evaluated by CITEG. In this prospective study, we analyzed the adverse events associated with immune-cell therapy until the end of September 2022, and we presented our interim safety evaluation.

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Background: The use of surgical metastasectomy (SM) has increased across cancer types in recent decades despite the increasing efficacy of modern systemic treatment modalities. Symptomatic spinal metastases severely compromise patients' performance status. However, as spinal SM is a complex surgery with potentially significant complications, it is not considered the treatment of choice.

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Aims: To evaluate the perioperative complications associated with total en bloc spondylectomy (TES) in patients with spinal tumours, based on the extent and level of tumour resection.

Methods: In total, 307 patients who underwent TES in a single centre were reviewed retrospectively. There were 164 male and 143 female patients with a mean age at the time of surgery of 52.

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Background Aims: Immunotherapy is effective for many types of cancer, but its benefits in advanced pancreatic cancer, which has a poor prognosis, are not well established. In this study, the authors examined the effects of adoptive T-cell immunotherapy (ATI) on immune cell profiles and prognosis in patients with unresectable advanced pancreatic cancer.

Methods: Seventy-seven patients with unresectable advanced pancreatic cancer were treated with six cycles of αβ T cells alone or in combination with chemotherapy or chemoradiation.

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Purpose: Leiomyosarcoma (LMS) is generally resistant to radiation and chemotherapy. Our study aimed to examine the outcomes of total en bloc spondylectomy (TES) for spinal metastatic LMS and to analyze potential factors associated with survival.

Methods: This study included 10 consecutive patients who underwent TES for spinal metastatic LMS at our institute between 2005 and 2016 and were followed up at a minimum of 3 years after surgery.

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Background Aims: Activated γδT cells have been shown to exhibit cytotoxicity against tumor cells. However, the efficacy of γδT cell immunotherapy for a large number of patients with solid tumors remains unclear. In this study, we examined the efficacy of γδT cell immunotherapy using in vitro-activated γδT lymphocytes in combination with standard therapies in terms of the survival of patients with solid tumors, and determined prognostic factor for γδT cell immunotherapy.

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Background: The benefits of surgery for symptomatic spinal metastases have been demonstrated, largely based on series of patients undergoing debulking and instrumentation operations. However, as cancer treatments improve and overall survival lengths increase, the incidence of recurrent spinal cord compression after debulking may increase. The aim of the current paper is to document the postoperative evolution of neurological function, pain, and quality of life following debulking and instrumentation in the Global Spine Tumor Study Group (GSTSG) database.

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Study Design: Retrospective study.

Objective: The purpose of this study was to examine motor and sensory impairments of the lower extremities after L2 nerve root transection during total en bloc spondylectomy (TES) for spinal tumors.

Summary Of Background Data: At our institute, for TES at L3 to L5 lumbar levels, the nerve roots are preserved.

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Aim: Surgery for spinal metastases can improve symptoms, but sometimes complications can negate the benefits. Operations may have different indications, complexities and risks, and the choice for an individual is a tailor-made personalised decision. Previous prognostic scoring systems are becoming out of date and inaccurate.

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Study Design: A prospective multicenter cohort study.

Objective: To assess the clinical accuracy of six commonly cited prognostic scoring systems for patients with spinal metastases.

Summary Of Background Data: There are presently several available methods for the estimation of prognosis in metastatic spinal disease, but none are universally accepted by surgeons for clinical use.

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This was a retrospective clinical study.This study aimed to evaluate our institution's experience with total en bloc spondylectomy (TES) in patients treated for primary lumbar spine tumors and investigate postoperative clinical outcomes.TES is a widely accepted by spinal and musculoskeletal surgical oncologists and results in favorable health-related quality of life outcomes.

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Background: As survival after treatment for symptomatic spinal metastases increases, the incidence of local tumor recurrence also may increase. However, data regarding incidence and timing of recurrence or duration of survival after second surgeries are not readily available and may help to inform clinicians when to perform second surgeries.

Objective: To identify features associated with loss of local control (LLC) at a previously treated or new spinal level.

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Background: Indications for surgery for symptomatic spinal metastases have become better defined in recent years, and suitable outcome measures have been established against a changing backdrop of patient characteristics, tumor behavior, and oncologic treatments. Nonetheless, variations still exist in the local management of patients with spinal metastases. In this study, we aimed to review global trends and habits in the surgical treatment of symptomatic spinal metastases, and to examine how these have changed over the last 25 years.

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Introduction: Multilevel total en bloc spondylectomy (TES) is required to secure oncologically adequate resection margins. However, no useful information has been reported for spinal reconstruction after multilevel TES. Therefore, this study set out to assess the clinical and radiological outcomes of spinal reconstruction after multilevel TES.

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Purpose: Survival after metastatic cancer has improved at the cost of increased presentation with metastatic spinal disease. For patients with pathologic spinal fractures and/or spinal cord compression, surgical intervention may relieve pain and improve quality of life. Surgery is generally considered to be inappropriate if anticipated survival is < 3 months.

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Introduction Metastatic spinal cancer is a common condition that may lead to spinal instability, pain and paralysis. In the 1980s, surgery was discouraged because results showed worse neurological outcomes and pain compared with radiotherapy alone. However, with the advent of modern imaging and spinal stabilisation techniques, the role of surgery has regained centre stage, though few studies have assessed quality of life and functional outcomes after surgery.

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Background And Objectives: Metastasectomy of spinal lesions from renal cell carcinoma (RCC) is a promising strategy. However, its clinical outcome after spinal metastasectomy is unknown owing to the difficulty of curative surgical resection. This is the first study to examine the survival rates of patients who underwent metastasectomy of solitary spinal metastases from RCC.

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 To present a previously unreported patient with recurrent spinal metastasis from subcutaneous sacrococcygeal ependymoma who was followed for 16 years.  A 50-year-old man who had T9 metastasis from subcutaneous sacrococcygeal ependymoma underwent piecemeal total T9 excision at a local hospital. He was referred to our institute because of weakness in both legs and bowel-bladder dysfunction with the presence of recurrent spinal metastasis at levels T9-T11.

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Background: Surgery for symptomatic spinal metastases aims to improve quality of life, pain, function, and stability. Complications in the postoperative period are not uncommon; therefore, it is important to select appropriate patients who are likely to benefit the greatest from surgery. Previous studies have focused on predicting survival rather than quality of life after surgery.

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This article describes a patient with multiple metastases from renal cell carcinoma who survived and maintained an ambulatory status for 15 years with no recurrence in the spine after en bloc resection of solitary spinal metastasis. Skeletal metastasis from renal cell carcinoma is common, second only to lung metastasis. Surgery plays an important role in the treatment of the metastasis because of its resistance to chemotherapy and radiotherapy.

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Many studies have evaluated patient satisfaction surgeries for primary cancers. No studies have evaluated patient satisfaction in metastasectomies. The authors examined patient and family satisfaction with en bloc total resection of solitary spinal metastases and evaluated the factors that correlated with dissatisfaction.

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Background: There are many reports of en bloc resection for spinal tumors. However, no studies have evaluated the clinical outcomes with follow-up exceeding 10 years after surgery.

Methods: We reviewed 82 patients who had undergone total en bloc spondylectomy (TES) before January 2002 and identified 29 (19 with primary tumors and 10 with metastatic tumors) who had survived for more than 10 years after surgery.

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Study Design: Retrospective clinical study.

Objective: To assess the clinical and radiological outcome of spinal reconstruction after total en bloc spondylectomy (TES) at 3 or more levels.

Summary Of Background Data: There have been few reports of multilevel spondylectomy for spinal tumor.

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Objective: To review suitable measures of patient-assessed outcome of surgery for spinal metastases, and suggest the Health-Related Quality of Life measures that are useful and practical for this group of patients.

Methods: Surgery for metastatic spinal tumors is becoming more common, but the impact of surgery on the patient, as determined by patient-assessed outcome measures, is not well known. The authors of this article include members of the Global Spine Tumour Study Group: an international group of spinal surgeons who are studying the techniques and outcomes of surgery for spinal tumors.

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