Cancer now is one of major problems that trouble human. is different from normal cell growth. Instead of dying, cancer cells continue to grow and form new, abnormal cells. Cancer cells can also invade (grow into) other tissues, something that normal cells cannot do. Growing out of control and invading other tissues are what makes a cell a cancer cell .Topic of my essay is about bone cancer.I decide to write this in topic because it involved elderly people that I they’re suffering from this disease. Make me interest in this disease. From now I show you what is osteosarcoma, symptom, diagnosis,Its cause and the possible ways to treat
Osteosarcoma is also known as osteogenic sarcoma. Sarcoma is a type of cancer that starts in the cells of the soft tissues or bone. Most of this disease are serious type (high-grade malignancy) rarely to find low-grade types in children. This disease is a malignant neoplasm of bone. It is among the most common non hematologic primary malignant tumors of bone in both children and adults. The conventional type arises in the intramedullary cavity of the bone and represents 75 % of all osteosarcomas.These tumors penetrate and destroy the cortex of the bone and extend into surrounding soft tissues
From embryonic cells mesenchymal stem cells grow as a malignant osteoid tissue that it spread to surrounding tissues quickly. And spread through the bloodstream. Makes the prognosis worse when 20 years ago, patients with no spread of the disease and surgery, then took out a tumor recurrence and were bornmore than 80% of patients die within 5 years 
Osteosarcoma develops in the osteoblast cells that cover the bone. It usually starts in ends of the long bones around the knee, where new tissue forms as children grow. However, osteosarcoma can also start in the upper leg, lower leg, upper arm bone, pelvis, shoulder, and skull. When cancer spreads from its original place to another part of the body, the new tumor has the same kind of...