Larotrectinib in Treating Patients With Previously Untreated TRK Fusion Solid Tumors and TRK Fusion Relapsed Acute Leukemia May 27, 2020checkorphan Learn more about: Fibrosarcoma Related Clinical Trial Larotrectinib in Treating Patients With Previously Untreated TRK Fusion Solid Tumors and TRK Fusion Relapsed Acute Leukemia Imatinib Mesylate in Treating Patients With Locally Recurrent or Metastatic Dermatofibrosarcoma Protuberans Recruitment InformationAdministrative Informations