Introduction to Bone Sarcomas
Sarcomas are malignant tumors of mesenchymal origin, while carcinomas derive from epithelial cells. They comprise approximately 1% of all malignancies, with soft tissue sarcomas being around 80% off all sarcomas. Bone sarcomas are seen more often in childhood (except chondrosarcomas), while soft tissue sarcomas predominate in the elderly. Since they have distinct features, they will be discussed separately (NCCN Guidelines (2012) Bone cancer. Version 2. www.nccn.org).