What is the neoplasm of unspecified soft tissue or bone?

Sarcoma: Lesions that arise from structures of soft tissue or bone are of mesenchymal origin. This stands in contrast to those tumors arising at glandular sites such as breast , ovary, prostate, colon, lung. The tumors of bone and soft tissue are termed sarcomas. In bone it is the osteo and chondro sarcoma. In soft tissue we find the liposarcoma (fat), fibrosarcoma (fibrous tissue origin),.

These are sarcomas: Lesions in non glandular structures such as supportive tissue are termed sarcomas. They arise anywhere in the body but appear most often in extremities. The mass on biopsy may appear adjacent to bone or in soft tissue but described as cartilaginous or osseous and represent a soft tissue origin not connected to bone. A PET and MRI can more clearly define origin for treatment decisions.