Sarcomas are a diverse and relatively rare group of malignant (cancerous) tumors that develop in soft tissue and bone. The type of sarcoma depends on where it forms:
- Soft tissue sarcomas form in cartilage, fat, muscle, fibrous tissue, blood vessels, and other connective or supportive tissues of the body
- Osteosarcomas develop in bone
- Liposarcomas form in fat
- Rhabdomyosarcomas form in muscle
- Ewing sarcomas form in bone and soft tissue
Sarcomas can be difficult to distinguish from other malignancies when they are found within organs. For this reason, their incidence is probably underestimated.