“…Nonconventional treatments for chondrosarcoma include molecularly-targeted therapies, epigenetic approaches, immunotherapy, and herbal therapies [ 33 , 36 ]. Some of the targets for chondrosarcoma therapies involve mutations of isocitrate dehydrogenases IDH1 and IDH2 [ 37 , 38 , 39 , 40 ], angiogenesis [ 41 , 42 ], cyclin-dependent kinases (CDK) [ 43 ], tyrosine kinase inhibitor [ 44 ], mechanisms involved in the signaling pathway of Rapamycin (mTOR) [ 45 , 46 ], agents of hypomethylation, and histone deacetylase (HDAC) [ 47 , 48 , 49 ]. Clinical studies involving immune checkpoint inhibition are in the early stages and show promising results despite patients’ mixed responses to some inhibitors [ 50 , 51 , 52 ].…”