A Pilot/Phase II Study of Gamma Knife Radiosurgery for Brain Metastases Using 3Tesla MRI and Rational Dose Selection
试验速览
- 阶段
- 不适用
- 状态
- 终止
- 入组人数
- 39
- 试验地点
- 2
- 主要终点
- Rate of Local Control Over time (RECIST Criteria)
研究概览
简要总结
The purpose of this study is to collect prospective data for use as a comparator for future subsequent studies attempting to increase the efficacy or reduce the toxicity of gamma knife radiosurgery.
详细描述
The aims of this study are to pilot a study to measure local control after "rational dose" selected gamma knife radiosurgery for brain metastases and to measure treatment related toxicity for rational dose selected gamma knife radiosurgery for brain metastases. In addition, the quality of life and neurocognition of patients undergoing gamma knife radiosurgery will be measured using the validated European Organisation for Research and Treatment of Cancer QLQ-C30 and QLQ-BN20 survey instruments. "Rational dose selection" is a concept wherein doses used for stereotactic radiosurgery is selected based on tumor volume, prior irradiation with whole brain radiotherapy, and the relative radioresistance of the tumor (radioresistant = melanoma, renal cell carcinoma, sarcoma; radiosensitive = breast cancer, lung cancer, colorectal cancer, gastrointestinal cancers).
Eligible patients will have histologically confirmed cancer and MRI evidence of metastatic disease within the brain. Patients will be eligible for the trial if intracranial radiosurgery has been recommended for treatment of brain metastases. Patients will be excluded if they have an extremely radiosensitive tumor (leukemia, lymphoma), a radiosensitivity syndrome, a resection of a brain metastasis, or cannot tolerate the MRI or placement of a stereotactic head frame. All patients must sign informed consent.
Radiation will consist of gamma knife radiosurgery delivered using doses selected based on the concept of "rational dose selection" as summarized above.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patients must have histologically or cytologically confirmed malignancy (not leukemia or lymphoma). There must be metastatic brain disease apparent on magnetic resonance imaging which offers a medical indication for brain radiation. - Age > 18
- •Karnofsky Performance Status > 70
- •MRI performed within 4 weeks of trial enrollment
- •Medical oncologist or consenting physician verifies that chemotherapy options exist after treatment with intracranial therapy, and that chemotherapy is planned to initiate after completion of radiation. Or, survival as estimated by the medical oncologist or enrolling physician is > 3 months.
排除标准
- •Extremely radiosensitive tumor (lymphoma, leukemia)
- •Radiosensitivity syndrome (scleroderma, dermatomyositis, other genetic syndrome that predisposes to adverse radiotherapy complications)
- •Evidence of leptomeningeal dissemination
- •Resection of brain metastases, otherwise untreated with radiation for those brain lesions (presenting for postoperative consolidative radiotherapy)
- •Presence of a medical device (pacemaker, stent) or allergy that precludes contrast enhanced MRI
- •Patient is unable to tolerate placement of a stereotactic headframe
- •Pregnancy
研究组 & 干预措施
Gamma Knife Radiosurgery
"Rational dose selection" is a concept wherein doses used for stereotactic radiosurgery is selected based on tumor volume, prior irradiation with whole brain radiotherapy, and the relative radioresistance of the tumor (radioresistant = melanoma, renal cell carcinoma, sarcoma; radiosensitive = breast cancer, lung cancer, colorectal cancer, gastrointestinal cancers).
Dose may be altered for lesions in the brainstem, adjacent to the optic nerve, optic chiasm, or motor cortex, or other clinical scenarios as defined by the treating physician. Reason for dose alteration will be recorded at the time of treatment.
For patients with 10+ brain metastases with multimorbidity or difficulty in tolerating a supine position, doses may be modified by the treating physicians for patient comfort.
干预措施: Gamma Knife Radiosurgery (Procedure)
结局指标
主要结局
Rate of Local Control Over time (RECIST Criteria)
时间窗: Up to 2 years
Response or progression of the radiated lesion will be measured by change in the largest unidimensional measurement. Additionally, response and progression will be evaluated in this study using the international criteria proposed by the Response Evaluation Criteria in Solid Tumors (RECIST) Committee Changes in only the largest diameter (unidimensional measurement) of the tumor lesions are used in the RECIST criteria. Local control is defined as a lack of progressive disease, as defined by the Response Evaluation Criteria in Solid Tumors (RECIST) criteria of a 20% increase in the longest diameter for a target lesion. If the lesion grows beyond 20% of the longest diameter of the pre-treatment, but subsequently regresses without further lesion-targeted radiotherapy, it will be assumed that the lesion was treatment related radiation necrosis in analysis
次要结局
未报告次要终点