Sarcomas are the malignant tumors of connective tissues. They can be grouped into two main types, soft tissue sarcomas and bone sarcomas (bone cancer), both of which are further divided into several subtypes based on their possible cell types of origin. More than one third of soft tissue sarcomas occur in the legs. This type of sarcomas can invade tissue around the original site and can metastasize to other organs, while some soft tissue sarcomas are non-cancerous. 

Learn more: Sarcoma CAR-T