A cancerous tumor of fat cells is called
A sarcoma is a type of cancer that develops from certain tissues, like bone or muscle. Bone and soft tissue sarcomas are the main types of sarcoma. Soft tissue sarcomas can develop from soft tissues like fat, muscle, nerves, fibrous tissues, blood vessels, or deep skin tissues.They can be found in any part of the body. Clear cell sarcoma is a rare cancer that often develops in tendons of the arms or legs. 2  Under the microscope, it has some features of malignant melanoma, a type of cancer that develops from pigment-producing skin cells. 3  How cancers with these features start in parts of the body other than the skin is not known.