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Expert Rev Anticancer Ther. 2012 Sep;12(9):1217-28. doi: 10.1586/era.12.100.

Clinical trial end points for assessing efficacy of novel therapies for soft-tissue sarcomas.

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  • 1Department of Medicine, Division of Hematology/Oncology, David Geffen School of Medicine, University of California Los Angeles, Santa Monica, CA 90404, USA.


Soft-tissue sarcomas (STS) comprise a heterogeneous group of rare malignancies from mesenchymal tissues. Although outcome varies by histology, adults with disseminated metastatic STS have a poor prognosis despite current treatment options. The authors reviewed commonly used clinical end points for STS and discussed which end points may be appropriate for evaluating the clinical benefit of novel targeted therapies. In sarcoma, surrogates for both overall survival, the gold standard end point, and the objective response rate, measured by Response Evaluation Criteria in Solid Tumors, are commonly used. More appropriate end points for evaluating newly targeted agents include progression-free survival and clinical benefit rate. Results from recently completed Phase III trials of two targeted therapies in advanced STS, the mTOR inhibitor ridaforolimus and the multikinase inhibitor pazopanib, should shed light on whether progression-free survival and clinical benefit rate are appropriate end points in advanced STS.

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