An acute angle (acute meaning sharp) is an angle smaller than a right angle (it is less than 90 degrees). Related pages[change | change source] This short article about mathematics can be made longer. You can help Wikipedia by adding to it.
Chondrosarcoma is a cancer composed of cells derived from transformed cells that produce cartilage. Chondrosarcoma is a member of a category of tumors of bone and soft tissue known as sarcomas. About 30% of skeletal system cancers are chondrosarcomas. It is resistant to chemotherapy and radiotherapy. Unlike other primary bone cancers that mainly affect children and adolescents, chondrosarcoma can present at any age.
The ribs, pelvis, leg, and upper arm are the most common sites. It usually shows up in bone, but it can also start in soft tissue around bones. Chondrosarcoma happens most often in people between 40 and 70. The hip, pelvis, leg, arm, and shoulder are common sites of this cancer, which begins in cartilage cells.