Abstract
The main clinical goal for patients with advanced or metastatic thoracic cancer is palliation of tumor-related symptoms and improvement of quality of life. The aim of this phase I–II trial was to define the maximum tolerated dose (MTD) of a short-course of palliative radiotherapy (RT) and to evaluate its efficacy in terms of palliative response. A phase I trial was planned with escalating dose increments. Total doses ranged from 16 to 20 Gy delivered (BID) in two consecutive days. Dose limiting toxicity was defined as any acute grade ≥ 3 toxicity based on the RTOG scale. MTD was used in the phase II trial to evaluate the efficacy of this regimen using a two stage Simon’s design. Fifty-four patients were enrolled. The upper dose level of 20 Gy was defined as the MTD. In patients treated with this dose, the overall palliative response rate was 96.5% (CI 0.95: 81.3–99.9%). Complete pain relief rate was 50.0%. Median survival without symptomatic progression was 3 months. The tested short course accelerated regimen was well tolerated and effective in the palliative setting of metastatic or locally advanced chest cancer. A phase III trial is ongoing to validate this RT schedule.
Trial registration: NCT03465553.
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Abbreviations
- CTV:
-
Clinical target volume
- CT:
-
Computed tomography
- DLT:
-
Dose limiting toxicity
- DVH:
-
Dose-volume histograms
- GTV:
-
Gross tumor volume
- MTD:
-
Maximum tolerated dose
- NSCLC:
-
Non-small cell lung cancer
- OaR:
-
Organs at risk
- PTV:
-
Planning target volume
- QoL:
-
Quality of life
- RT:
-
Radiotherapy
- SHARON:
-
SHort course Accelerated RadiatiON therapy
- VAS:
-
Visual Analogue self-assessment Scale
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The study was approved by our institutional Ethics Committee in accordance with the Helsinki Declaration. All patients provided written informed consent before study entry.
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Farina, E., Macchia, G., Buwenge, M. et al. Radiotherapy in palliation of thoracic tumors: a phase I–II study (SHARON project). Clin Exp Metastasis 35, 739–746 (2018). https://doi.org/10.1007/s10585-018-9942-6
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DOI: https://doi.org/10.1007/s10585-018-9942-6