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64 active trials for Radiotherapy

Adaptative MR-Guided Stereotactic Body Radiotherapy of Liver Tumors

Hepatic metastases are common in solid cancers (up to 30% of patients with colorectal cancer and up to 50% of patients during their follow-up). The incidence of primary liver cancer increases due to the increase in chronic liver diseases induced by excessive alcohol consumption, hepatitis B and C viruses, and excess fat in the liver. Surgical excision of these liver lesions is the reference treatment but it cannot always be realised. Stereotactic radiotherapy is a recent technique proposed to hepatic metastases treatment from solid cancers and primary hepatic lesions (HCC or cholangiocarcinomas); it is possible to deliver high doses of radiation in the most conformational way possible in order to limit the irradiation of the non-tumor liver. The results of this stereotactic radiotherapy are currently very good with control rates of 75 to 80% at 1 and 2 years with acceptable rates of severe toxicities of 10%. However, the fear of hepatic, digestive (colon, esophagus, stomach) or even cardiac toxicities limits its using to the majority of patients because coupled with a conventional scanner it do not allow direct visualization of the lesion. Due to its non-irradiating nature, MRI guided stereotactic radiotherapy can generate continuous imaging, during the irradiation session, offering " in live " a visualization of the tumor target and organs at risk of proximity. In increasing the precision and safety in the delivery of irradiation, it allows to hope for several areas for improvement of treatment: reduced uncertainty margins an increase in the dose delivered the accessibility of tumor lesions near sensitive organs (esophagus, stomach, heart chambers, intestines, duodenum, right kidney). More, this accelerator allows a re-optimization of the initial dosimetric plan to the anatomical changes of the day to allow an MRI guided adaptive radiotherapy.

Start: November 2019
Study Assessing Stereotactic Radiotherapy in Therapeutic Strategy of Oligoprogressive Renal Cell Carcinoma Metastases

Every year, 12500 primary renal cell carcinoma (RCC) are diagnosed in France. Metastases occur in half of RCC patients. Management of metastatic RCC is based on systemic treatments (targeted therapies/immunotherapy). However, resistance to systemic treatment is frequent. In case of progression, usual therapeutic attitude is initiating another systemic therapy. Because of the emergence of resistant tumor clonal cells, some patients progress only on few sites while the rest of tumor burden is controlled. In this setting named oligoprogressive disease [isolated progression of <3-5 metastase(s)], ablative treatments of these evolving metastatic sites could allow a disease control and a reduced risk of new metastases occurrence by tumor-cell reembolization. Such strategy is challenging to prolong ongoing systemic treatment and delay further lines. Although RCC was considered radioresistant and radiotherapy with conventional fractionation was mainly used for palliation of symptoms, stereotactic radiotherapy (SRT), by delivering high dose in one or few fractions, allows local control for about 90% of RCC metastases through various radiobiological pathways. Furthermore, some data suggest that high-dose focal irradiation of RCC could induce a systemic antitumor response mediated by immunologic effectors(1). This phenomenon ("abscopal effect") could be enhanced in patients under immunotherapy, including anti-PD1. Several retrospective studies and one non-randomized phase-II study highly suggest the interest of SRT as focal ablative treatment in RCC oligometastases with excellent local control rates and low toxicity(2,3). Furthermore, the multicentric retrospective study the sponsor recently conducted within the GETUG group among 101 metastatic RCC patients with oligoprogression under systemic therapy highlighted that SRT on progressive sites provided a median of 8.6-month progression-free survival and allowed to continue current systemic line for 10.5 months. However, to date, there are no prospective data assessing the interest of SRT for management of oligoprogressive metastatic RCC. The sponsor aim to prospectively evaluate the interest of SRT as a therapeutic strategy for local control of oligoprogressive metastatic RCC under ongoing systemic treatment, and consequently delay subsequent systemic treatment.

Start: July 2020
Locoregional Treatment and Palbociclib in de Novo, Treatment Naive, Stage IV ER+, HER2- Breast Cancer Patients

Approximately 3.5% to 6% of newly diagnosed breast cancer patients are stage IV metastatic. De novo metastatic breast cancer accounts for 20% to 25% of these cases. Despite a decrease in mortality in Europe and North America due to early detection and access to treatment, breast cancer remains the 2?? leading cause of cancer deaths in developed countries after lung cancer and the world's leading cause. In the ESME French national retrospective cohort (NCT03275311), the newly diagnosed estrogen receptor (ER)-positive and HER2-negative (luminal) metastatic patients had a 59.1 months overall survival (OS) for pre-menopausal women and 44.7 months for postmenopausal women. In the same cohort, the median OS was 47.4 months for de novo metastatic patients with hormone receptor (HR)-positive / HER2-negative breast cancer. The most important current treatment for metastatic breast cancer remains systemic therapy. Surgery and radiation are mainly used to treat symptoms. However, more than 15 retrospective studies have assessed the impact of locoregional treatment on relapse and OS. These studies suggested an improvement of the OS in patients with de novo metastatic breast cancer thanks to the addition of locoregional treatment to systemic therapy. Recent data from the ESME cohort suggest that patients with de novo luminal or HER2-positive metastatic breast cancer may benefit from local treatment of the primary tumor. Several prospective trials have attempted to demonstrate the benefit of locoregional treatment with mixed results. This can be explained by a limited power of statistical analysis, on the recruitment of patients with breast cancer of all types, and on a limited access to effective systemic therapies in some cases and all before the area of anti CD4/6 which is the current standard treatment in patients with HR-positive / HER2-negative luminal metastatic disease. However, guidelines indicate that a "multimodal approach, including curative locoregional treatments, should be considered". As a result, many clinicians offer locoregional treatment of the primary tumor, especially if there is a good response to the first line of systematic treatment. Taken together, these data underscore the need for an evaluation of the value of combined therapy - endocrine therapy - CDK4/6 inhibitor and locoregional treatment - in this population of patients with newly diagnosed HR-positive / HER2-negative breast cancer.

Start: October 2019
The GCO-002 CACOVID-19 Cohort: a French Nationwide Multicenter Study of COVID-19 Infected Cancer Patients

Since December 2019, China and then the rest of the world have been affected by the rapid development of a new coronavirus, SARS-CoV-2 (severe acute respiratory syndrome corona virus 2). The disease caused by this coronavirus (COVID-19), which is transmitted by air via droplets, is potentially responsible for a severe respiratory syndrome but also for a multivisceral deficiency that can lead to death. Cancer patients are generally more susceptible to infections than people without cancer due to immunosuppression caused by their tumor disease and/or conventional anti-cancer treatments used such as cytotoxic chemotherapy, several targeted therapies, radiotherapy or recent surgery. These patients may therefore be at particular risk for COVID-19. This is suggested by the very first analysis on the subject, which reports data from the Chinese prospective database of 2007 patients with proven COVID-19 infection in 575 hospitals in 31 Chinese provinces. The authors of this publication conclude with 3 measures to be proposed to patients undergoing cancer follow-up: 1/ consider postponing adjuvant chemotherapy or surgery in the case of localized and stable cancer, 2/ reinforce protective measures for these patients, and 3/ monitor very closely and treat these patients more intensively when they have a COVID-19. However, the increased risk of SARS-CoV-2 infection and severe forms of COVID-19 in cancer patients suggested by this first study remains to be demonstrated given its limitations, already highlighted by other authors. Indeed, the number of patients is small and the population of cancer patients is very heterogeneous, with in particular 12 patients out of 16 who had recovered from initial cancer treatments (therefore without immunosuppression), half of whom had a disease course of more than 4 years. Nevertheless, a second Chinese study has just recently been published, reporting COVID-19 data among 1524 cancer patients admitted between December 30, 2019 and February 17, 2020 in the Department of Radiotherapy and Medical Oncology of the University Hospital of Wuhan, the source city of the COVID-19 epidemic. Although the rate of CoV-2 SARS infection was lower than that reported in the first study, it was still 0.79% (n=12), which is much higher than the rate of COVID-19 diagnosed in Wuhan City during the same period (0.37%, 41 152/11 081 000). Again, lung cancer was the main tumour location observed in 7 patients (58%), of which 5 (42%) were undergoing chemotherapy +/- immunotherapy. Three deaths (25%) were reported. Patients over 60 years of age with lung cancer had a higher incidence of COVID-19 (4.3% vs. 1.8%). Thus, it appears that the risk of COVID-19 is actually increased in cancer patients, although again, less than half of the patients with lung cancer had a higher incidence of COVID-19. Moreover, two more recent studies performed in patients treated in Hubei Province of China and in New-York city found that patients with cancer had significantly increased risk of death compared to non-cancer COVID-19 patients, especially patients with metastatic cancer and those who had recent surgery. Therefore, many questions remain to date on the level of risk and the severity of COVID-19 in patients with active cancer, in particular those under anti-cancer treatment and in patients recently operated for localized cancer.

Start: April 2020
Comparison Between Endovascular and Bronchoscopic Tumor Marker Insertion for Real-time Stereotactic-guided Radiotherapy in Lung Cancer

The role of radiotherapy is well established in the management of early stage lung cancer or as part of a multidisciplinary approach of locally advanced lung cancer (1). Recent advances in Cyberknife© technology, which is a robotic system of stereotactic irradiation including localisation and real time lesion-tracking, has led to an increase in accuracy and potentially in efficiency of the irradiation of tumor field (2)(3). According to several studies, promising results in local control and survival rates have been achieved in patients suffering from primary lung cancer or peripheral lung metastasis treated with Cyberknife© (4)(5)(6)(7)(8). Fiducial markers are implanted in or near a tumor in a configuration defining a COM (center of mass) guiding the Cyberknife for tumor localization. Tumor movement is then synchronized to respiratory cycle motion during treatment which reduces toxicity of non target lung tissue irradiation. Change in marker positioning leads to COM alterations, thus limiting detection by the tracking system. Percutaneous (9)(10)(11) (12), endovascular (12)(13) fiducial implantation or by means of bronchoscopic devices (14)(15)(16)(17)(18) are three techniques that have been validated in previous studies as feasible and safe procedures, providing accurate tracking. Few studies are currently available in the litterature comparing these modalities (19)(20). The percutaneous implantation technique will not be considered for this study because this technique is associated with a high risk of pneumothorax (9). Both the endobronchial and endovascular technique have been described in the literature with equivalent success rate (87-90%) in intention to treat (21)(22). One of the endpoints of this study is to verify that these results are reproducible in our institution where both techniques are currently available and to investigate other secondary endpoints such as fiducial marker migration after placement, complications rates and procedure time.

Start: October 2016