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Concept
Sarcoma
Summary
A sarcoma is a malignant tumor, a type of cancer that arises from transformed cells of mesenchymal (connective tissue) origin. Connective tissue is a broad term that includes bone, cartilage, fat, vascular, or hematopoietic tissues, and sarcomas can arise in any of these types of tissues. As a result, there are many subtypes of sarcoma, which are classified based on the specific tissue and type of cell from which the tumor originates. Sarcomas are primary connective tissue tumors, meaning that they arise in connective tissues. This is in contrast to secondary (or "metastatic") connective tissue tumors, which occur when a cancer from elsewhere in the body (such as the lungs, breast tissue or prostate) spreads to the connective tissue. Sarcomas are one of five different types of cancer, classified by the cell type from which they originate. The word sarcoma is derived from the Greek σάρκωμα sarkōma 'fleshy excrescence or substance', itself from σάρξ sarx meaning 'flesh'.
Sarcomas are typically divided into two major groups: bone sarcomas and soft-tissue sarcomas, each of which has multiple subtypes. In the United States, the American Joint Committee on Cancer (AJCC) publishes guidelines that classify the subtypes of sarcoma. These subtypes are as follows:
Osteosarcoma
Chondrosarcoma
Poorly differentiated round/spindle cell tumors (includes Ewing sarcoma)
Hemangioendothelioma
Angiosarcoma
Fibrosarcoma/myofibrosarcoma
Chordoma
Adamantinoma
Other:
Liposarcoma
Leiomyosarcoma
Malignant peripheral nerve sheath tumor
Rhabdomyosarcoma
Synovial sarcoma
Malignant solitary fibrous tumor.
Official source
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