Clinical utility of circulating tumor DNA sequencing with a large panel in patients with advanced soft-tissue sarcomas

To the editor Soft-tissue sarcomas(STS)represent a very heterogeneous group of rare tumors including more than 100 different subtypes[1].Surgery and neo/adjuvant radiation therapy represent the cornerstone of treatment for STS.However,despite an optimal resection of the tumor,up to 40%of patients will develop metastatic relapse and will die from the disease[1].Doxorubicin represents the first-line standard of care for patients with advanced disease since the 1970s,despite several attempts to identify better regimens.The median overall survival(OS)of patients with metastatic disease is<18 months and has only modestly improved over the past 20 years[2].