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It is a type of bone cancer that destroys tissue and weakens the bone.

Also called osteogenic sarcoma, OSTEOSARCOMA usually begins in osteoblasts, which are a type of bone cell that converts into new bone tissue. It is the most common type of bone cancer usually affecting the long bones of the arm and leg. It occurs more affected in adolescents and affects more men than women.
It usually begins in the leg bone around the knee joint, either in the femur or in the tibia. The next most frequent place to start is the number.

Some groups of people are more likely to develop it:

* People who have received radiation treatment for other types of cancer. (The time between radiation treatment and the risk of osteosarcoma is usually more than a decade.)
* Children with an inherited form of retinoblastoma.
* Children with Li-Fraumeni syndrome (Rare p53 disorder, which is responsible for removing abnormal cells).
* Children with Werner syndrome.
* People with Rothmund-Thomson syndrome (a rare disorder characterized by short stature, rash, hair loss and skeletal dysplasia).

The symptoms depend on the bone in which the tumor develops. Osteosarcoma can cause the following symptoms or signs:
* Pain in a bone or joint that gets worse over time, especially if the pain is severe enough to interfere with sleep.
* A noticeable mass or lump in an arm or leg, particularly in the areas around the shoulder or knee.
* A broken bone without damage that explains how damaged.
* Back pain or loss of control of the intestines or bladder.

If you are concerned about any changes in your child, seek advice with your doctor. For the Institute of Interventional Oncology (IDOI Mexico) it is important to remind you at times, an osteosarcoma does not present any of these signs, or the cause may be other than cancer.