Spinal Metastases Clinical Trial
Official title:
Kypho-Intra Operative Radiation Therapy (IORT) for Localized Spine Metastasis, Phase I/II Study
Kypho-IORT is a novel approach to combine kyphoplasty, a minimally invasive procedure, with a single dose of intraoperative radiotherapy (IORT) for the treatment of unstable or potentially unstable spinal cord metastases. The primary objective is to evaluate the response rate of pain control when combining kyphoplasty, a minimally invasive procedure, with a single dose of intraoperative radio- therapy (IORT) for the treatment of spinal cord metastases. Secondary objectives are (i.) to determine feasibility for unstable or potential unstable spine metastases; (ii.) to determine tolerability/side effects of the IORT within 90 days post-procedure; (iii.) to determine which clinical factors are prognostic of vertebral compression fracture
Approximately 20% of patients with spine metastasis present with unstable lesions, which represent a common therapeutic dilemma in patients with advanced stage cancer and limited survival time. Management necessitates spinal stabilization surgery such as laminectomy, vertebroplasty, or kyphoplasty for mechanical back pain control and irradiation for the underlying malignant process. Because of the limited survival time of patients with metastatic cancer, novel, more convenient treatment concepts to shorten the overall treatment time or hospitalization are desirable. We developed a novel approach to combine kyphoplasty, a minimally invasive procedure, with a single dose of intraoperative radio- therapy (IORT) for the treatment of spinal cord metastases. Patients treated with Kypho-IORT will receive a prescribed dose of 8 Gy in 1 fraction from The Intrabeam® Photon Radiosurgery System source. The target volume includes only the tumor. The technique of the operation and the delivery of radiotherapy has been described and published previously. TARGiT Academy training and requisite test cases have been completed prior to enrolling subjects on this study. The balloon kyphoplasty, which is an advancement of the vertebroplasty, is a treatment option for fractured vertebral bodies which utilizes bone cement to provide needed support. Outcome measures will include complete or partial pain relief or a stable response at the index site requiring no increase in narcotic pain medication. Therefore, patients with complete or partial pain relief will be considered responders. Patients with complete or partial pain relief at the index site but a progressive response at the secondary site(s) will be considered non-responders. Quality of Life Measurements. It is hypothesized that quality of life (QOL) will improve after Kypho-IORT due to rapid and durable pain control after spine treatment. In the current study, we will measure the QOL [EORTC QLQ-C30 (version 3)], the Brief Pain Inventory (BPI), ambulation , and steroid and narcotic use pre- and post-procedure at 1-week, 3-month, 6-month, 9-month, 1-year, and 2-year intervals. The involved spine will be imaged at 3-month intervals up to one year, and at 2 years post-procedure. All the evidence to date supports the description of the Intrabeam as delivering an accurate and reliable dose. Physicists on site will be responsible for verifying the miniature x-ray source is operational prior to use and setting up the parameters within the control console software for treatment delivery. During the procedure, the control console monitors the system for safe and accurate dose delivery. ;
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