Publications by authors named "Shoji Yomo"

Article Synopsis
  • A systematic review was conducted to evaluate the use of stereotactic radiosurgery (SRS) specifically in pediatric patients, aiming to inform guidelines by the International Stereotactic Radiosurgery Society (ISRS).
  • The study analyzed 68 articles focusing on outcomes for around 400 children with brain tumors and over 5000 with arteriovenous malformations (AVMs) from 1989 to 2021, reporting varying local control rates for different tumor types.
  • The findings indicated that SRS demonstrated suitable local control rates for pediatric brain tumors and AVMs, but data availability is limited, leading to the development of ISRS consensus guidelines for its use in this population.
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Objective: The International Stereotactic Radiosurgery Society aims to establish evidence-based guidelines for single-fraction stereotactic radiosurgery (SRS) in treating intracranial cavernous malformations.

Methods: We conducted a systematic review following Preferred Reporting Items for Systematic Reviews and Meta-Analyses and Meta-analysis of Observational Studies in Epidemiology guidelines, searching electronic databases up to January 2024 to assess SRS's impact on post-treatment hemorrhage rates. Pooled risk ratios (RRs) and confidence intervals were used to quantify this effect, along with assessments of lesion volume changes, seizure outcomes, and SRS-related adverse effects.

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Objective: Treatment with immune checkpoint inhibitors (ICIs) has shown clinical benefit for a wide range of cancer types. The neutrophil-to-lymphocyte ratio (NLR) reportedly correlates with survival time or progression-free survival in patients treated with ICIs. However, NLR has not yet been assessed in patients with brain metastases (BMs) receiving stereotactic radiosurgery (SRS) combined with concurrent ICIs.

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Background And Objectives: Consensus guidelines do not exist to guide the role of stereotactic radiosurgery (SRS) in the management of patients with Spetzler-Martin Grade III-V arteriovenous malformations (AVMs). We sought to establish SRS practice guidelines for Grade III-V AVMs based on a critical systematic review of the published literature.

Methods: A Preferred Reporting Items for Systematic Reviews and Meta-Analyses-compliant search of Medline, Embase, and Scopus, 1986 to 2023, for publications reporting post-SRS outcomes in ≥10 Grade III-V AVMs with the median follow-up ≥24 months was performed.

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Background And Objectives: Repeat stereotactic radiosurgery (SRS) for residual arteriovenous malformations (AVMs) can be considered as a salvage approach after failure of initial SRS. There are no published guidelines regarding patient selection, timing, or SRS parameters to guide clinical practice. This systematic review aimed to review outcomes and complications from the published literature to inform practice recommendations provided on behalf of the International Stereotactic Radiosurgery Society.

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Background: We aimed to evaluate patient-reported outcomes (PROs) of stereotactic radiosurgery (SRS) for TN in terms of treatment efficacy and toxicity.

Methods: We retrospectively analyzed patients who underwent Gamma Knife SRS for idiopathic or classic TN between January 2013 and February 2022. Questionnaires regarding pain relief, treatment toxicity, and post-SRS treatment were sent between late 2022 and early 2023, and the responses received were analyzed.

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Background: The choice of an appropriate strategy for intracanalicular vestibular schwannoma (ICVS) is still debated. We conducted a systematic review and meta-analysis with the aim to compare treatment outcomes amongst management strategies (conservative surveillance (CS), microsurgical resection (MR), or stereotactic radiosurgery (SRS)) aiming to inform guideline recommendations on behalf of the International Stereotactic Radiosurgery Society (ISRS).

Methods: Using PRISMA guidelines, we reviewed manuscripts published between January 1990 and October 2021 referenced in PubMed or Embase.

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Purpose: To perform a systematic review of literature specific to single-fraction stereotactic radiosurgery (SRS) for large vestibular schwannomas (VS), maximum diameter ≥ 2.5 cm and/or classified as Koos Grade IV, and to present consensus recommendations on behalf of the International Stereotactic Radiosurgery Society (ISRS).

Methods: The Medline and Embase databases were used to apply the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) approach.

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Article Synopsis
  • - A review of literature assessed various treatments for radiation necrosis (RN) resistant to corticosteroids, focusing on the effectiveness and safety of treatments like bevacizumab, laser interstitial thermal therapy (LITT), surgical resection, and hyperbaric oxygen therapy.
  • - Bevacizumab showed promising results with an 86% improvement/stability rate for symptoms and very high rates for T2 (93%) and T1 postcontrast (94%) imaging outcomes; lower doses were particularly effective for symptom relief.
  • - Other treatments such as LITT and surgical resection had similar efficacy, reporting 88% and 89% improvement/stability rates respectively, with toxicity generally reported as low across all treatment options. *
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Objective: Stereotactic radiosurgery (SRS) is the mainstay treatment for brain metastases (BMs) from lung cancer. In recent years, immune checkpoint inhibitors (ICIs) have been applied to metastatic lung cancer and have contributed to improved outcomes. The authors investigated whether SRS with concurrent ICIs for lung cancer BMs prolongs overall survival (OS), improves intracranial disease control, and raises safety concerns.

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Article Synopsis
  • The study investigates the outcomes of stereotactic radiosurgery (SRS) for small-cell lung cancer (SCLC) brain metastases compared to non-small cell lung cancer (NSCLC), addressing historical concerns about SCLC's prognosis and neurological risks.
  • Data from multiple centers and a clinical trial were analyzed, focusing on overall survival (OS) and central nervous system (CNS) progression for patients with SCLC and NSCLC over a 22-year period.
  • Results indicated that patients with NSCLC experienced better overall survival compared to those with SCLC, with significant differences in survival and CNS progression rates across various analyses, particularly favoring NSCLC cases.
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Objective: A retrospective comparative analysis of the outcomes of gamma knife radiosurgery (GKRS) for brain metastases from uterine cervical carcinoma (CC) and endometrial carcinoma (EC), investigated the efficacy and prognostic factors for survival and local tumor control. Histopathological analysis was also performed.

Methods: The authors retrospectively reviewed 61 patients with 260 tumors of CC and 73 patients with 302 tumors of EC who had undergone GKRS.

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Purpose: The objective of this literature review was to develop International Stereotactic Radiosurgery Society (ISRS) consensus technical guidelines for the treatment of small, ≤1 cm in maximal diameter, intracranial metastases with stereotactic radiosurgery. Although different stereotactic radiosurgery technologies are available, most of them have similar treatment workflows and common technical challenges that are described.

Methods And Materials: A systematic review of the literature published between 2009 and 2020 was performed in Pubmed using the Preferred Reporting Items for Systematic Review and Meta-analyses (PRISMA) methodology.

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Objective: Stereotactic radiosurgery (SRS) is the mainstay for treating brain metastases (BMs) from renal cell carcinoma (RCC). In recent years, immune checkpoint inhibitors (ICIs) have been applied to metastatic RCC and have contributed to improved outcomes. The authors investigated whether SRS with concurrent ICIs for RCC BM prolongs overall survival (OS) and improves intracranial disease control and whether there are any safety concerns.

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Background: Dural arteriovenous fistulas (dAVFs) are often treated with stereotactic radiosurgery (SRS) to achieve complete obliteration (CO), prevent future hemorrhages, and ameliorate neurological symptoms.

Objective: To summarize outcomes after SRS for dAVFs and propose relevant practice recommendations.

Methods: Using a PICOS/PRISMA/MOOSE protocol, we included patients with dAVFs treated with SRS and data for at least one of the outcomes of the study.

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Objective: Radiotherapy has an essential role in the management of skull base chondrosarcomas (SBCs) after resection. This multi-institutional study evaluated the outcomes of Gamma Knife radiosurgery (GKRS) for histopathologically proven SBCs.

Methods: Data of patients who underwent GKRS for SBCs at Gamma Knife centers in Japan were retrospectively collected.

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Objective: Brain metastasis is rare in ovarian cancer patients. The results of Gamma Knife radiosurgery (GKRS) for the treatment of patients with brain metastases from ovarian cancer were retrospectively analyzed to derive the efficacy and prognostic factors for survival and local tumor control. Further histopathological analysis was also performed.

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Background And Purpose: The Renal Graded Prognostic Assessment (GPA) is relatively new and has not been sufficiently validated using a different dataset. We thus developed a new grading index, the Renal Brain Metastasis Score (Renal-BMS).

Materials And Methods: Using our dataset including 262 renal cancer patients with brain metastases (BMs) undergoing stereotactic radiosurgery (SRS) (test series), we validity tested the Renal-GPA.

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Objective: The authors investigated and compared the results of staged stereotactic radiosurgery (S-SRS) alone and those of postoperative cavity SRS (C-SRS) for patients with midsize-to-large brain metastases (BMs).

Methods: Patients with BMs who had undergone S-SRS or C-SRS during the period from 2010 to 2020 were retrospectively identified from an institutional database. The two treatment groups were generated by propensity score matching (PSM; match ratio 2:1) based on 13 potential prognostic covariates: sex, age, Karnofsky Performance Status, type of primary cancer, timing of BM diagnosis, extracranial disease status, driver mutations, molecular target therapy, neurological symptoms, number of BMs, location of BMs treated with S-SRS or C-SRS, maximal tumor or cavity volume, and cumulative intracranial tumor volume.

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Anterior cervical discectomy and fusion(ACDF)was developed by R.B. Cloward in the 1950s and it has spread over the world for the treatment of the spinal degenerative disorders.

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Purpose: To determine safety and efficacy of postoperative spine stereotactic body radiation therapy (SBRT) in the published literature, and to present practice recommendations on behalf of the International Stereotactic Radiosurgery Society.

Methods And Materials: A systematic review of the literature was performed, specific to postoperative spine SBRT, using PubMed and Embase databases. A meta-analysis for 1-year local control (LC), overall survival (OS), and vertebral compression fracture probability was conducted.

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Objective: A systematic review was performed to provide objective evidence on the use of stereotactic radiosurgery (SRS) in the management of secretory pituitary adenomas and develop consensus recommendations.

Methods: The authors performed a systematic review of the English-language literature up until June 2018 using the PRISMA guidelines. The PubMed (Medline), Embase, and Cochrane databases were searched.

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Background: Deep brain stimulation (DBS) of the pedunculopontine nucleus (PPN) has been reported to improve gait disturbances in Parkinson's disease (PD); however, there are controversies on the radiological and electrophysiological techniques for intraoperative and postoperative confirmation of the target and determination of optimal stimulation parameters.

Objectives: We investigated the correlation between the location of the estimated PPN (ePPN) and neuronal activity collected during intraoperative electrophysiological mapping to evaluate the role of microelectrode recording (MER) in identifying the effective stimulation site in two PD patients.

Materials And Methods: Bilateral PPN DBS was performed in two patients who had suffered from levodopa refractory gait disturbance.

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Purpose: The purpose of this critical review is to summarize the literature specific to single-fraction stereotactic radiosurgery (SRS) and multiple-fraction stereotactic radiation therapy (SRT) for postoperative brain metastases resection cavities and to present practice recommendations on behalf of the ISRS.

Methods And Materials: The Medline and Embase databases were used to apply the Preferred Reporting Items for Systematic Reviews and Meta-Analyses approach to search for manuscripts reporting SRS/SRT outcomes for postoperative brain metastases tumor bed resection cavities with a search end date of July 20, 2018. Prospective studies, consensus guidelines, and retrospective series that included exclusively postoperative brain metastases and had at minimum 100 patients were considered eligible.

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