This trial is an open, single arm, single center, prospective phase II clinical study. Objective:To observe the efficacy and safety of Fruquintinib in the first-line treatment of desmoplastic small round cell tumor, epithelioid hemangioendothelioma, solitary fibroma or second-line and posterior line treatment of angiosarcoma.
To evaluate the efficacy of Fruquintinib in patients with chemotherapy insensitive or chemotherapy resistant soft tissue sarcoma