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Radiat Oncol ; 13(1): 152, 2018 Aug 20.
Artigo em Inglês | MEDLINE | ID: mdl-30126440

RESUMO

BACKGROUND: In an oligometastatic setting, metastasis-directed treatment could render patients disease free, possibly for a protracted interval. Stereotactic ablative radiotherapy (SABR) is one of the treatment modalities that can be offered to these patients. In addition, the radiobiological qualities of SABR are promising for the use in perceived radioresistant tumours. There is also emerging evidence that SABR can stimulate the immune response, and a specific therapeutic window may exist for the optimal use of radiotherapy as an immune adjuvant. However, when SABR is considered for non-spine bone or lymph node metastases, the optimal fractionation schedule is not yet known. METHODS: The DESTROY-trial is a non-randomized prospective phase I trial determining a regimen of choice for patients with non-spine bone and lymph node metastases. A total of 90 patients will be included in three different treatment regimens. They will be offered stereotactic ablative radiotherapy in 5, 3 or 1 fractions. Dose-limiting toxicity will be recorded as primary endpoint. Acute and late toxicity, local response and local recurrence, and progression-free survival are secondary endpoints. Liquid biopsies will be collected throughout the course of this study from the second fractionation schedule on. DISCUSSION: Despite its almost universal use in (oligo-)metastatic patients, the level of evidence supporting radical local treatment in general, and stereotactic radiotherapy in particular, is low. This prospective phase I trial will evaluate different SABR regimens for metastases and the differences in immune-stimulatory effects. TRIAL REGISTRATION: The Ethics committee of the GZA Hospitals (B099201732915) approved this study on 05/07/2017. Amendment for translational research was approved on 06/02/2018. Trial registered on Clinicaltrials.gov ( NCT03486431 ) on 03/04/2018 - Retrospectively registered.


Assuntos
Neoplasias Ósseas/radioterapia , Ensaios Clínicos Fase I como Assunto , Irradiação Linfática/métodos , Radiocirurgia/métodos , Fracionamento da Dose de Radiação , Humanos , Linfonodos , Metástase Linfática/radioterapia , Seleção de Pacientes , Estudos Prospectivos , Radiocirurgia/efeitos adversos
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