What Is Osteosarcoma (Bone Cancer)?
Bone is the supporting framework of the body. The bone is a hollow structure. The outer layer of the bone consists of a network of fibrous tissues also called matrix, on which calcium salts are deposited. At each end of the bone is a zone of cartilage, a softer form of bone-like tissue. Cartilage consists of a fibrous tissue matrix mixed with a gel-like substance. Unlike bone, cartilage does not contain calcium. Cartilage acts as cushion between bones and, together with ligaments and some other tissues, forms the joints between bones.
The outside of the bone is covered with a fibrous tissue called periosteum. The bone contains 2 types of cells. The osteoclast is the cell responsible for forming the bone, and the osteoclast is the cell responsible for dissolving the bone. Bone marrow is the soft tissue inside the hollow bones. The marrow of some bones consists of only fatty tissues. The marrow of other bones is a mixture of flat cells and blood-forming cells. These blood-forming cells produce red blood cells, white blood cells, and blood platelets. There are some other cells in the marrow such as plasma cells, fibroblasts, and reticuloendothelial cells.
Primary bone cancers
(1) Osteosarcoma: — Osteosarcoma is the tumor of the bone itself; it is the most common bone cancer. It is more common in younger people. Males are more likely to be affected.
(2) Chondrosarcoma: — This is a cancer of cartilage cells. The risk of this type of cancer rises with age.
(3) Ewing’s tumor: — Ewing’s tumor usually develops in bones, and a very small percentage arises in other tissues or organs. Ewing’s tumors of the bone forms in the cavity of the bone. This cancer is primarily seen in children and younger people.
(4) Chordae: — This type of bone cancer usually occurs in the base of the skull and bones of the spine.
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