A International Study on MRI-guided Brachytherapy in Locally Advanced Cervical Cancer
试验速览
- 阶段
- 不适用
- 入组人数
- 1,416
- 试验地点
- 1
- 主要终点
- local control/morbidity
研究概览
简要总结
Background:
The standard treatment of locally advanced cervical cancer is radio-chemotherapy including external beam radiotherapy (EBRT), brachytherapy (BT) and concomitant chemotherapy with weekly Cisplatin. While image based conformal EBRT is routinely used, prescription and reporting of BT is still based on specific dose points defined in 2D. Thus, for several decades the BT dose has most often been prescribed and reported to the Manchester point A defined according to different traditions.
Recently, a working group from GEC-ESTRO has published recommendations on contouring of tumour target and organs at risk (OAR) as well as on dose volume parameters to be reported for image guided BT in definitive radiotherapy for locally advanced cervical cancer. These recommendations are mainly derived from retrospective single institution experience with MRI based intracavitary BT. The major advantage of this technique is the possibility to conform the dose given by BT with regard to both volume (3D) and time (4D). Thus, by repetitive imaging performed before each BT implant it is possible adapt the dose given by BT to the anatomy of each individual patient taking into account not only the position of OAR but also the tumour regression which often is obtained by preceding EBRT and chemotherapy. Based on the experience collected so far, the image based BT approach is expected to have a major impact on the clinical outcome with a concomitant decrease in the rates of both local failure and morbidity.
Aims:
- To introduce MRI based 3D-4D BT in locally advanced cervical cancer in a multicenter setting within the frame of a prospective observational study.
- To establish a bench-mark for clinical outcome with image based BT in a large patient population with respect to local control, survival, morbidity and QoL
- To establish a reference material with regard to image based DVH parameters according to the guidelines from the GEC ESTRO working group.
- To correlate image based DVH parameters for CTV and for OAR with outcome
- To develop prognostic and predictive statistical models for clinical outcome including volumetric, dosimetric, clinical and biological risk factors
- To establish radiobiological parameter estimates that will allow a precise risk estimation in individual patients and aid in the development of new treatment protocols
详细描述
A prospective observational multicenter study will be performed in patients with locally advanced cervical cancer considered to be potentially curable by definitive radio-(chemo) therapy. The patients will be divided and analyzed in three strata according to risk of recurrence:
- Small tumours
- Large tumours favourable response
- Large tumours with unfavourable response to the initial radio-(chemo) therapy.
A clinical local failure has to be validated by MRI and topographically correlated to the MRI based BT targets (HR CTV and IR-CTV) and the dose volume parameters of the treatment plan. It has to be classified as "inside", "at the edge", "outside".
Major events with regard to morbidity have to be reported using 3D imaging information integrating e.g. clinical examination, endoscopy and MRI. The location of organ damage (i.e. fistula) has to be identified in 3D and a correlation to the dose volume parameters for the affected region should be investigated.
Specific Aims
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 性别
- Female
- 接受健康志愿者
- 否
入选标准
- •Cancer of the uterine cervix considered suitable for curative treatment with definitive radio-(chemo)therapy including MRI guided BT
- •Positive biopsy showing squamous-cell carcinoma, adenocarcinoma or adeno-squamous cell carcinoma of the uterine cervix.
- •Staging according to FIGO and TNM guidelines
- •MRI of pelvis at diagnosis is performed
- •MRI, CT or PET-CT of the retroperitoneal space and abdomen at diagnosis is performed
- •MRI with the applicator in place at the time of (first) BT will be performed
- •Para-aortic metastatic nodes below L1-L2 are allowed
- •Patient informed consent
排除标准
- •Other primary malignancies except carcinoma in situ of the cervix and basal cell carcinoma of the skin
- •Metastatic disease beyond para-aortic region (L1-L2)
- •Previous pelvic or abdominal radiotherapy
- •Previous total or partial hysterectomy
- •Combination of preoperative radiotherapy with surgery
- •Patients receiving BT only
- •Patients receiving EBRT only
- •Patients receiving neoadjuvant chemotherapy
- •Contra indications to MRI
- •Contra indications to BT
- •Active infection or severe medical condition endangering treatment delivery
- •Pregnant, lactating or childbearing potential without adequate contraception
结局指标
主要结局
local control/morbidity
时间窗: 5 years
次要结局
- overall survival(5 years)
- quality of life (QoL)(5 years)
- disease free survival(5 years)
- regional control(5 years)
研究者
Richard Pötter
Principal investigator
Medical University of Vienna