Razoxane and vindesine in advanced soft tissue sarcomas: impact on metastasis, survival and radiation response.

Background: The treatment options in advanced soft tissue sarcomas (STS) are limited. In a pilot study, an antimetastatic and radiosensitizing treatment concept was explored.

Patients And Methods: Twenty-one patients with unresectable and/or oligometastatic STS received the drugs razoxane and vindesine supported by radiotherapy and surgery. Long-term treatment was intended in metastatic disease. Forty-one patients with comparable stages of STS treated with contemporary chemotherapy served as non-randomised controls. The prognostic parameters of the groups were comparable.

Results: In the study group, the median number of new metastases after 6 months was 0 (range, 0-40) and after 9 months likewise 0 (0-70). The corresponding numbers in the control group were 4.5 (range, 0-40) and 9 (0->100) (p<0.001). The progression-free survival at 6 months was 71% in the study group and 23% in the controls, and the median survival time from the occurrence of the first metastasis was 16 months versus 9 months. The rate of major responses under radiotherapy combined with razoxane and vindesine was 88%, and in the control group 62% (p=0.007). The combined treatment was associated with a low to moderate toxicity.

Conclusion: The treatment combination inhibited the development of remote metastases in the majority of patients with STS and prolonged survival to some extent.