Cancer

Cancer is a group of diseases characterized by uncontrolled growth of tissue cells in the body and the invasion by these cells into nearby tissue and migration to distant sites. Cells are the building blocks of living things.
Cancer grows out of normal cells in the body. Normal cells multiply when the body needs them, and die when the body doesn't need them. Cancer appears to occur when the growth of cells in the body is out of control and cells divide too quickly. It can also occur when cells forget how to die.
There are many different kinds of cancers. Cancer can develop in almost any organ or tissue, such as the lung, colon, breast, skin, bones, or nerve tissue.

Osteosarcoma

Osteosarcoma is a type of cancer that produces immature bone. It is the most common type of cancer that arises in bones, and it is usually found at the end of long bones, often around the knee. Most people diagnosed with osteosarcoma are under the age of 25, and it is thought to occur more often in males than females.
Osteosarcomas range from low grade tumors that only require surgery to high grade tumors that require an aggressive treatment regimen. Patients with osteosarcoma are best treated at a cancer center where an expert sarcoma team and resources are available to provide specialized and responsive care. Scientists have not discovered the cause of most cases of osteosarcoma. Osteosarcoma can develop as a result of radiation to an area of the body. It can also be associated with specific genetic changes and diseases.