Sarcoma Clinical Trial
Official title:
Hypofractionated Radiotherapy With Hyperthermia in Unresectable or Marginally Resectable Soft Tissue Sarcomas
After a screening, which consists of biopsy, physical examination, initial diffusion-weighted magnetic resonance imaging (DWI-MRI) or body computed tomography (CT) scan, blood tests and case analysis on Multidisciplinary Team (MDT) meeting, a patient will receive the hypofractionated radiotherapy 10x 3.25 Gy with regional hyperthermia (twice a week) within two weeks. The response analysis in CT or DWI-MRI and toxicity assessment will be performed after at least 6 weeks. At the second MDT meeting, a final decision about resectability of the tumor will be made. In case of resectability or consent for amputation, if required, a patient will be referred to surgery. In case of unresectability or amputation refusal, the patient will receive the second part of the treatment which consists of 4x 4 Gy with hyperthermia (twice a week).
There is a lack of standard treatment of unresectable and marginally resectable sarcomas. Results of commonly used approaches are unsatisfactory, especially in patients who are not candidates for neoadjuvant chemotherapy due to poor performance status, comorbidities, radioresistant pathology or disease progression on the commonly used chemotherapy regimens. The addition of regional hyperthermia to irradiation and in the prolonged gap between the end of hypofractionated 10x 3.25 Gy radiotherapy and surgery may allow obtaining the long-term local control with the maintenance of a good treatment tolerance. Hypofractionation represents a variation of radiotherapy fractionation in which the total dose is divided into fewer fractions with an increased fraction dose. Such treatment may lead to additional biological effects when compared to conventionally fractionated radiotherapy (eg. vascular damage, increased immunogenicity, and antigenicity). The main advantages of hypofractionation are those related to the decreased overall treatment time which is more convenient for both patients and physicians, increased compliance and makes the treatment more cost-effective. Intriguing, such an approach may provide an additional benefit when treating non-radiosensitive tumors with a low alpha/beta ratio (eg. sarcomas). Hyperthermia is a method of increasing the temperature in the tumor to damage cancer cells with minimum injury to the normal cells. It should be combined with another treatment modality (radio- or chemotherapy) rather than used alone. Its efficacy was proven in clinical trials. The treatment tolerance is usually very good. ;
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