Chondrosarcoma is a rare type of cancer called a sarcoma, which develops in the bones and soft tissues of the body. Most chondrosarcomas begin in the bones. A small number develop in the soft tissues away from bones (extraskeletal chondrosarcomas).
Many chondrosarcomas are low-grade tumors that grow slowly and rarely spread (metastasize) to other areas of the body. However, some chondrosarcomas are intermediate- and high-grade tumors that behave more aggressively.
Chondrosarcomas often affect middle-aged and older adults. They most commonly occur in the pelvis or thigh (femur) bones.