A slowly growing malignant growth derived from cartilage cells, occurring most
frequently in pelvic bones or near the ends of long bones, in middle-aged and old people.
Chondrosarcoma is the second most common type of bone cancer, occurring in
about 26 percent of all bone cancer cases. Some researchers believe there
also is a link between chondrosarcoma and repeated trauma to the site of the
bone cancer, but it's not clear whether the injury makes the cancer more
likely or the cancer makes the site weaker and more susceptible to injury