6,601 results match your criteria stereotactic body

Individualized Fraction Regimen of SBRT Patients With Non-Small Cell Lung Cancer Based on Uncomplicated and Cancer-Free Control Probability.

Technol Cancer Res Treat 2021 Jan-Dec;20:15330338211011967

Department of Radiation Oncology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China.

Introduction: Stereotactic body radiotherapy (SBRT) currently adopts non-discriminative prescription regimen. This study attempts to investigate an individualized fraction regimen (IFR) method for SBRT patients with non-small cell lung cancer (NSCLC) based on Uncomplicated and Cancer-free Control Probability (UCFCP).

Methods: Twenty patients with NSCLC were retrospectively prescribed with 40 regimens, ranging from 8Gy×5f to 12Gy×5f in step of 0. Read More

View Article and Full-Text PDF

The timing and design of stereotactic radiotherapy approaches as a part of neoadjuvant therapy in pancreatic cancer: Is it time for change?

Clin Transl Radiat Oncol 2021 May 19;28:124-128. Epub 2021 Apr 19.

Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, NE, USA.

Stereotactic Radiotherapy (SRT) over 5-15 days can be interdigitated without delaying chemotherapy. Bridging chemotherapy may allow for extended intervals to surgery, potentially improving sterilization of surgical margins and overall survival. SRT for pancreatic adenocarcinoma should not be limited to the tumor, and should consider hypofractionated approaches to regional nodes. Read More

View Article and Full-Text PDF

Avasopasem manganese synergizes with hypofractionated radiation to ablate tumors through the generation of hydrogen peroxide.

Sci Transl Med 2021 May;13(593)

Division of Molecular Radiation Biology, Department of Radiation Oncology, and Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.

Avasopasem manganese (AVA or GC4419), a selective superoxide dismutase mimetic, is in a phase 3 clinical trial (NCT03689712) as a mitigator of radiation-induced mucositis in head and neck cancer based on its superoxide scavenging activity. We tested whether AVA synergized with radiation via the generation of hydrogen peroxide, the product of superoxide dismutation, to target tumor cells in preclinical xenograft models of non-small cell lung cancer (NSCLC), head and neck squamous cell carcinoma, and pancreatic ductal adenocarcinoma. Treatment synergy with AVA and high dose per fraction radiation occurred when mice were given AVA once before tumor irradiation and further increased when AVA was given before and for 4 days after radiation, supporting a role for oxidative metabolism. Read More

View Article and Full-Text PDF

Long-term survival of 11 years with multidisciplinary therapy for hepatocellular carcinoma metastasis to the ovary and peritoneum: a case report.

Clin J Gastroenterol 2021 May 12. Epub 2021 May 12.

Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Niigata, Japan.

We herein report a rare case of HCC metastases to the ovary and peritoneum in a 61-year-old female patient who has achieved 11-year survival with multidisciplinary therapy. The patient was diagnosed with HCC during balloon angioplasty performed for Budd-Chiari syndrome in 1994 and underwent partial hepatectomy twice. Five years after the second hepatectomy, allochronic recurrence of a single nodule detected in S8 was treated by radiofrequency ablation, followed by percutaneous ethanol injection therapy and stereotactic body radiotherapy. Read More

View Article and Full-Text PDF

Magnetic resonance imaging-guided stereotactic body radiotherapy for prostate cancer (mirage): a phase iii randomized trial.

BMC Cancer 2021 May 11;21(1):538. Epub 2021 May 11.

Department of Radiation Oncology, University of California Los Angeles, 200 Medical Plaza Driveway, Suite # B265, Medical Plaza Driveway, Los Angeles, CA, 90095, USA.

Background: Stereotactic body radiotherapy (SBRT) is becoming increasingly used in treating localized prostate cancer (PCa), with evidence showing similar toxicity and efficacy profiles when compared with longer courses of definitive radiation. Magnetic resonance imaging (MRI)-guided radiotherapy has multiple potential advantages over standard computed tomography (CT)-guided radiotherapy, including enhanced prostate visualization (abrogating the need for fiducials and MRI fusion), enhanced identification of the urethra, the ability to track the prostate in real-time, and the capacity to perform online adaptive planning. However, it is unknown whether these potential advantages translate into improved outcomes. Read More

View Article and Full-Text PDF

Lung Stereotactic Body Radiotherapy (SBRT) Using Spot-Scanning Proton Arc (SPArc) Therapy: A Feasibility Study.

Front Oncol 2021 22;11:664455. Epub 2021 Apr 22.

Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI, United States.

Purpose: We developed a 4D interplay effect model to quantitatively evaluate breathing-induced interplay effects and assess the feasibility of utilizing spot-scanning proton arc (SPArc) therapy for hypo-fractionated lung stereotactic body radiotherapy (SBRT). The model was then validated by retrospective application to clinical cases.

Materials And Methods: A digital lung 4DCT phantoms was used to mimic targets in diameter of 3cm with breathing motion amplitudes: 5, 10, 15, and 20 mm, respectively. Read More

View Article and Full-Text PDF

Nivolumab and Hypofractionated Radiotherapy in Patients With Advanced Lung Cancer: ABSCOPAL-1 Clinical Trial.

Front Oncol 2021 22;11:657024. Epub 2021 Apr 22.

Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, China.

Background: More clinical practice need to be performed to verify the toxicity of the hypofractionated radiotherapy (HFRT) combined with PD-1 blockade in lung cancer. This phase I study aimed to investigate the safety and efficacy of nivolumab combined with HFRT in patients with progressive advanced lung cancer following multiline treatment.

Methods: We enrolled 31 patients with advanced lung cancer pathologically confirmed to have progressive disease and treated with first-line or a higher therapy. Read More

View Article and Full-Text PDF

Gamma Radiation-Induced Rib Necrosis and Stereotactic Radiosurgery Failure.

Cureus 2021 Apr 5;13(4):e14302. Epub 2021 Apr 5.

Thoracic Surgery, Boca Raton Regional Hospital/Lynn Cancer Institute, Boca Raton, USA.

Stereotactic radiosurgery, or SRS, uses focused beams of gamma radiation targeted to specific areas of the body and has been used for multiple forms of non-small cell lung cancer. In this article, the authors describe two incidental cases of osteonecrosis in patients who had previously undergone stereotactic radiosurgery with recurrence of tumor. While this is a known side effect of traditional radiation therapy, it has not been described in the context of stereotactic radiosurgery. Read More

View Article and Full-Text PDF

A patient with metastatic non-small cell lung cancer who received pembrolizumab monotherapy after stereotactic body radiotherapy had progression-free survival of nearly 5 years: a case report.

Ann Palliat Med 2021 Apr;10(4):4999-5009

Department of Cardiothoracic Surgery, Hwa Mei Hospital, University of Chinese Academy of Sciences (Ningbo No. 2 Hospital), Ningbo, China; Ningbo Institute of Life and Health Industry, University of Chinese Academy of Sciences (Ningbo No. 2 Hospital), Ningbo, China.

Lung cancer is a malignancy with the highest morbidity and mortality in the world. Radiotherapy, chemotherapy, targeted therapy, and immunotherapy have been widely used to treat metastatic non-small cell lung cancer (NSCLC). Stereotactic body radiotherapy (SBRT), also known as stereotactic ablation radiotherapy (SABR), can precisely deliver a high dose of radiation to a target in a limited area. Read More

View Article and Full-Text PDF

Addressing the dosimetric impact of bone cement and vertebroplasty in stereotactic body radiation therapy.

Phys Med 2021 May 6;85:42-49. Epub 2021 May 6.

Institut Curie, PSL Research University, Radiation Oncology Department, Paris, France; Institut Curie, University Paris Saclay, PSL Research University, Inserm LITO, Orsay, France. Electronic address:

Purpose: Bone cement used for vertebroplasty can affect the accuracy on the dose calculation of the radiation therapy treatment. In addition the CT values of high density objects themselves can be misrepresented in kVCT images. The aim of our study is then to propose a streamlined approach for estimating the real density of cement implants used in stereotactic body radiation therapy. Read More

View Article and Full-Text PDF

Salvage stereotactic body radiotherapy (SBRT) for intraprostatic relapse after prostate cancer radiotherapy: An ESTRO ACROP Delphi consensus.

Cancer Treat Rev 2021 Apr 20;98:102206. Epub 2021 Apr 20.

Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.

Background And Purpose: Between 30% and 47% of patients treated with definitive radiotherapy (RT) for prostate cancer are at risk of intraprostatic recurrence during follow-up. Re-irradiation with stereotactic body RT (SBRT) is emerging as a feasible and safe therapeutic option. However, no consensus or guidelines exist on this topic. Read More

View Article and Full-Text PDF

SBRT for HCC: Overview of technique and treatment response assessment.

Abdom Radiol (NY) 2021 May 7. Epub 2021 May 7.

Department of Radiology, University of Michigan, Ann Arbor, MI, USA.

Stereotactic body radiation therapy (SBRT) is an emerging locoregional treatment (LRT) modality used in the management of patients with hepatocellular carcinoma (HCC). The decision to treat HCC with LRT is evaluated in a multidisciplinary setting, and the specific LRT chosen depends on the treatment intent, such as bridge-to-transplant, down-staging to transplant, definitive/curative treatment, and/or palliation, as well as underlying patient clinical factors. Accurate assessment of treatment response is necessary in order to guide clinical management in these patients. Read More

View Article and Full-Text PDF

Neoadjuvant immunoradiotherapy results in high rate of complete pathological response and clinical to pathological downstaging in locally advanced head and neck squamous cell carcinoma.

J Immunother Cancer 2021 May;9(5)

Providence Cancer Institute, Portland, Oregon, USA

Background: Checkpoint inhibitors targeting programmed death receptor-1 (PD-1) have been tested in the neoadjuvant setting for the treatment of locoregionally advanced head and neck squamous cell carcinoma (HNSCC); however, response rates are modest. We hypothesized that adding stereotactic body radiation therapy (SBRT) to anti-PD-1 would be safe prior to definitive surgical resection and would enhance pathological response compared with historical cohorts of patients with locoregionally advanced HNSCC treated with checkpoint inhibitor alone.

Methods: The Neoadjuvant Immuno-Radiotherapy Trial was an investigator-initiated single institution phase Ib clinical trial that enrolled patients with previously untreated locally advanced HPV-positive and HPV-negative HNSCC between 2018 and 2019. Read More

View Article and Full-Text PDF

Checkpoint inhibition in combination with an immunoboost of external beam radiotherapy in solid tumors (CHEERS): study protocol for a phase 2, open-label, randomized controlled trial.

BMC Cancer 2021 May 7;21(1):514. Epub 2021 May 7.

Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium.

Background: While the introduction of checkpoint inhibitors (CPIs) as standard of care treatment for various tumor types has led to considerable improvements in clinical outcome, the majority of patients still fail to respond. Preclinical data suggest that stereotactic body radiotherapy (SBRT) could work synergistically with CPIs by acting as an in situ cancer vaccine, thus potentially increasing response rates and prolonging disease control. Though SBRT administered concurrently with CPIs has been shown to be safe, evidence of its efficacy from large randomized trials is still lacking. Read More

View Article and Full-Text PDF

Risk Adapted Ablative Radiotherapy After Intensive Chemotherapy for Locally Advanced Pancreatic Cancer.

Front Oncol 2021 20;11:662205. Epub 2021 Apr 20.

Department of Radiation Oncology, University of Verona Hospital Trust, Verona, Italy.

Background And Objective: To assess the efficacy of a Risk-Adapted Ablative Radiotherapy (RAdAR) approach, after intensive induction chemotherapy, in patients with locally advanced pancreatic cancer (LAPC).

Material And Methods: Patients with LAPC who received RAdAR following induction chemotherapy from January 2017 to December 2019 were included in this observational study. The RAdAR approach consisted of an anatomy- and simultaneous integrated boost (SIB)-based dose prescription strategy. Read More

View Article and Full-Text PDF

Comparison of liver exposure in CT-guided high-dose rate (HDR) interstitial brachytherapy versus SBRT in hepatocellular carcinoma.

Radiat Oncol 2021 May 6;16(1):86. Epub 2021 May 6.

Department of Radiation Oncology, University Hospital, LMU Munich, 81377, Munich, Germany.

Background: In unresectable hepatocellular carcinoma several local ablative treatments are available. Among others, radiation based treatments such as stereotactic body radiotherapy (SBRT) and high-dose rate interstitial brachytherapy (HDR BT) have shown good local control rates.

Methods: We conducted a dose comparison between actually performed HDR BT versus virtually planned SBRT to evaluate the respective clinically relevant radiation exposure to uninvolved liver tissue. Read More

View Article and Full-Text PDF

Using Waterless Alcohol-based Antiseptic for Skin Preparation and Active Thermal Support in Laboratory Rats.

J Am Assoc Lab Anim Sci 2021 May 4. Epub 2021 May 4.

Rodents are frequently used for models that require surgical procedures. At our institution, laboratory rats are increasingly preferred for investigations of neurologic disorders, cardiovascular interventions, and assessment and treatment of addictive and depressive behaviors. For these types of studies, surgical preparations of the head and neck areas are necessary for catheterization and instrumentation. Read More

View Article and Full-Text PDF

Non-invasive ablation of arrhythmias with stereotactic ablative radiotherapy.

Trends Cardiovasc Med 2021 May 2. Epub 2021 May 2.

Brigham and Women's Hospital, Boston, MA; Harvard Medical Schools. Electronic address:

Stereotactic ablative radiotherapy (SABR), or stereotactic body radiotherapy (SBRT), has recently been applied in the field of arrhythmia management. It has been most widely assessed in the treatment of ventricular tachycardia (VT) but may also have potential in the treatment of other arrhythmias as well, often termed stereotactic arrhythmia radiotherapy (STAR). The non-invasive delivery of treatment for VT has the potential to spare an often physiologically vulnerable group of patients the burden of long catheter ablation procedures with the potential for prolonged periods of hemodynamic instability. Read More

View Article and Full-Text PDF

Case Report-Staged brachytherapy achieving complete metabolic response in unresectable oligometastatic colorectal cancer to the liver.

Oxf Med Case Reports 2021 Apr 28;2021(4):omab016. Epub 2021 Apr 28.

Department of Radiation Oncology, National University Cancer Institute Singapore.

Liver is the most common site for metastasis from colorectal cancer (CRC). Non-surgical treatment options for oligometastatic CRC confined to the liver which represents an intermediate state in the metastatic cascade are fast expanding. Currently, several liver-directed local therapeutic options are available, such as hepatic arterial infusion (HAI) therapy, radio-frequency ablation (RFA), transarterial chemoembolization (TACE), stereotactic body radiotherapy and high dose rate brachytherapy (HDRBT). Read More

View Article and Full-Text PDF

Benefit of replanning in MR-guided online adaptive radiation therapy in the treatment of liver metastasis.

Radiat Oncol 2021 May 4;16(1):84. Epub 2021 May 4.

Department of Radiation Oncology, University Hospital of Zurich, University of Zurich, Raemistrasse 100, 8091, Zurich, Germany.

Purpose: To assess the effects of daily adaptive MR-guided replanning in stereotactic body radiation therapy (SBRT) of liver metastases based on a patient individual longitudinal dosimetric analysis.

Methods: Fifteen patients assigned to SBRT for oligometastatic liver metastases underwent daily MR-guided target localization and on-table treatment plan re-optimization. Gross tumor volume (GTV) and organs at risk (OARs) were adapted to the anatomy-of-the-day. Read More

View Article and Full-Text PDF

Development of an Objective Scoring System for Endoscopic Assessment of Radiation-Induced Upper Gastrointestinal Toxicity.

Cancers (Basel) 2021 Apr 29;13(9). Epub 2021 Apr 29.

Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030, USA.

We developed and implemented an objective toxicity scoring system to be used during endoscopic evaluation of the upper gastrointestinal (GI) tract in order to directly assess changes in toxicity during the radiation treatment of pancreatic cancer. We assessed and validated the upper GI toxicity of 19 locally advanced pancreatic cancer trial patients undergoing stereotactic body radiation therapy (SBRT). Wilcoxon-signed rank tests were used to compare pre- and post-SBRT scores. Read More

View Article and Full-Text PDF

Study protocol of the LARK (TROG 17.03) clinical trial: a phase II trial investigating the dosimetric impact of Liver Ablative Radiotherapy using Kilovoltage intrafraction monitoring.

BMC Cancer 2021 May 3;21(1):494. Epub 2021 May 3.

ACRF Image X Institute, Sydney, NSW, Australia.

Background: Stereotactic Ablative Body Radiotherapy (SABR) is a non-invasive treatment which allows delivery of an ablative radiation dose with high accuracy and precision. SABR is an established treatment for both primary and secondary liver malignancies, and technological advances have improved its efficacy and safety. Respiratory motion management to reduce tumour motion and image guidance to achieve targeting accuracy are crucial elements of liver SABR. Read More

View Article and Full-Text PDF

Contribution of Imaging to Organs at Risk Dose during Lung Stereotactic Body Radiation Therapy.

J Biomed Phys Eng 2021 Apr 1;11(2):125-134. Epub 2021 Apr 1.

PhD, Department of Radiation Oncology, Tenon Hospital, 75020 Paris, France.

Background: The use of imaging is indispensable in modern radiation therapy, both for simulation and treatment delivery. For safe and sure utilization, dose delivery from imaging must be evaluated.

Objective: This study aims to investigate the dose to organ at risk (OAR) delivered by imaging during lung stereotactic body radiation therapy (SBRT) and to evaluate its contribution to the treatment total dose. Read More

View Article and Full-Text PDF

Stereotactic body radiation therapy for non-small cell lung cancer using the non-coplanar radiation of Cyberknife and Varian linac.

J Xray Sci Technol 2021 Apr 29. Epub 2021 Apr 29.

Department of Nuclear Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, P. R. China.

Purpose: This study aims to evaluate the planned dose of stereotactic body radiation therapy (SBRT) for treating early peripheral non-small cell lung cancer (NSCLC) using the non-coplanar radiation from Cyberknife and Varian linac. Moreover, this study investigates whether Cyberknife and Varian linac are qualified for non-coplanar radiation SBRT for treating early peripheral NSCLC, and which one is better for protecting organs at risk (OARs).

Methods: Retrospective analysis was performed based on the Cyberknife radiation treatment plans (RTPs) and Varian Eclipse RTPs of 10 patients diagnosed with early peripheral NSCLC. Read More

View Article and Full-Text PDF

Can reducing planning safety margins broaden the inclusion criteria for lung stereotactic ablative body radiotherapy?

J Med Radiat Sci 2021 May 2. Epub 2021 May 2.

South Western Clinical School, Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia.

Introduction: Stereotactic ablative body radiotherapy (SABR) is currently indicated for inoperable, early-stage non-small cell lung carcinoma (NSCLC). Advancements in image-guidance technology continue to improve treatment precision and enable reductions in planning safety margins. We investigated the dosimetric benefits of margin reduction, its potential to extend SABR to more NSCLC patients and the factors influencing plan acceptability. Read More

View Article and Full-Text PDF

Short-segment cement-augmented fixation in open separation surgery of metastatic epidural spinal cord compression: initial experience.

Neurosurg Focus 2021 May;50(5):E11

1Department of Neurological Surgery, Memorial Sloan Kettering Cancer Center; and.

Objective: High-grade metastatic epidural spinal cord compression from radioresistant tumor histologies is often treated with separation surgery and adjuvant stereotactic body radiation therapy. Historically, long-segment fixation is performed during separation surgery with posterior transpedicular fixation of a minimum of 2 spinal levels superior and inferior to the decompression. Previous experience with minimal access surgery techniques and percutaneous stabilization have highlighted reduced morbidity as an advantage to the use of shorter fixation constructs. Read More

View Article and Full-Text PDF

Long-Term Outcomes from a Phase 2 Trial of Radiofrequency Ablation Combined with External Beam Radiation Therapy for Patients with Inoperable Non-Small Cell Lung Cancer.

Int J Radiat Oncol Biol Phys 2021 Apr 28. Epub 2021 Apr 28.

Department of Radiation Oncology, Wake Forest School of Medicine, Winston-Salem, NC. Electronic address:

Purpose: Long-term outcomes after external beam radiation therapy (EBRT) and radiofrequency ablation (RFA) for medically inoperable early stage non-small cell lung cancer (NSCLC) are not well-known.

Materials And Methods: Patients with medically inoperable early stage NSCLC were enrolled in a prospective single-arm, phase 2 study between June 2007 and October 2008 and were treated with RFA followed by EBRT. Radiation was delivered using hypofractionated RT (HFRT) (70. Read More

View Article and Full-Text PDF

Case series on stereotactic body radiation therapy in non-ischemic cardiomyopathy patients with recurrent ventricular tachycardia.

Pacing Clin Electrophysiol 2021 May 1. Epub 2021 May 1.

Heart Rhythm Center, Division of Cardiology, Department of Internal Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.

Introduction: The efficacy of stereotactic body radiation therapy (SBRT) as an alternative treatment for recurrent ventricular tachycardia (VT) is still unclear. This study aimed to report the outcome of SBRT in VT patients with nonischemic cardiomyopathy (NICM).

Methods: The determination of the target substrate for radiation was based on the combination of CMR results and electroanatomical mapping merged with the real-time CT scan image. Read More

View Article and Full-Text PDF

Efficacy and acquired resistance for EGFR-TKI plus thoracic SBRT in patients with advanced EGFR-mutant non-small-cell lung cancer: a propensity-matched retrospective study.

BMC Cancer 2021 Apr 30;21(1):482. Epub 2021 Apr 30.

Department of Oncology, The Second Affiliated Hospital of Nanchang University, Nanchang University, No.1 Minde Street, Nanchang, 330000, Jiangxi Province, People's Republic of China.

Background: This retrospective study aimed to evaluate the efficacy of epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) with stereotactic body radiation therapy (SBRT) and to elucidate potential mechanisms of acquired resistance.

Methods: Patients with advanced NSCLC harboring positive EGFR mutations after initial TKI therapy for at least 8 weeks were eligible for SBRT between August 2016 and August 2019. Eligible patients were treated with thoracic SBRT, and TKI was continued after SBRT until it was considered ineffective. Read More

View Article and Full-Text PDF