Randomised Trial of Proton vs. Carbon Ion Radiation Therapy in Patients With Chordoma of the Skull Base -Clinical Phase III Study-
试验速览
- 阶段
- 3 期
- 入组人数
- 319
- 试验地点
- 2
- 主要终点
- local-progression free survival (LPFS)
研究概览
简要总结
This study is a prospective randomised clinical phase III trial. The primary objective of this study is to evaluate, if the innovative therapy (carbon ion irradiation) in chordomas is superior to the standard proton treatment with respect to the local-progression free survival (LPFS).
详细描述
The study is a prospective randomised clinical phase III trial. The trial will be carried out at Heidelberger Ionenstrahl-Therapie (HIT) centre as monocentric trial.
Proton therapy is the gold standard in the treatment of skull base chordomas. However, high-LET beams such as carbon ions theoretically offer biologic advantages by enhanced biologic effectiveness in slow-growing tumors. Up until now it was impossible to compare two different particle therapies, i.e. proton and carbon ion therapy directly with each other. The aim of this study is to find out, whether the biological advantages of carbon ion therapy mentioned above can also be clinically confirmed.
Patients with skull base chordoma will be randomised to either proton or carbon ion radiation therapy. As a standard, patients will undergo non-invasive, rigid immobilization and target volume delineation will be carried out based on CT and MRI data. The biologically isoeffective target dose to the PTV in carbon ion treatment (accelerated dose) will be 63 Gy E ± 5% and 72 Gy E ± 5% (standard dose) in proton therapy respectively. Local-progression free survival (LPFS) will be analysed as primary end point. Toxicity and survival are the secondary end points. Also matters of interest are patterns of recurrence, prognostic factors and plan quality.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 80 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Karnofsky Performance Score ≥60%
- •Age >18 years and <80 years
- •Informed consent signed by the patient
- •Histological confirmation of chordoma with infiltration of the skull base.
排除标准
- •Inability to understand the aims of the study, no informed consent
- •Prior RT of skull base region
- •Other malignancies with disease-free interval < 5 years (excepting pre- cancerous lesions)
- •Participation in another trial
- •Pregnancy
- •Simultaneous CHT or Immunotherapy.
结局指标
主要结局
local-progression free survival (LPFS)
时间窗: 8-years
The primary objective of this study is to evaluate, if the innovative therapy (carbon ion irradiation) in chordomas is superior to the standard proton treatment with respect to the LPFS defined as time from the randomisation to observed local reccurrence or death from any cause in the absence of documented local disease progression. Lo-cal recurrence defined as MRT or CT - morphological tumor progress in the former irradiated region. A 10% increase in the LPFS is considered clinically relevant as-suming that the LPFS rate for the proton therapy is 70%.
次要结局
- Survival(8-years)
- Local control and patterns of recurrence(8 years)
- Toxicity(8 years)