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.
Mesenchymal chondrosarcoma is an extremely rare, often aggressive form of cancer. It is a variant type of conventional chondrosarcoma. Conventional chondrosarcoma is a form of bone cancer that arises from cartilage cells. Cartilage is the specialized tissue that serves as a buffer or cushion at joints. Most of the skeleton of an embryo consists of cartilage, which is slowly converted into bone. Approximately two-thirds of cases of mesenchymal chondrosarcoma affect the bones, especially the spine, ribs or jaws.