Risks and causes of bone cancer
We don’t know what causes most bone cancers. But there are some risks factors that can increase your risk of developing it. Some of these include your age, exposure to ionising radiation and inherited conditions.
What is a risk factor?
Anything that can increase your risk of getting a disease is called a risk factor.
Different cancers have different risk factors. Having one or more of these risk factors doesn't mean you will definitely get that cancer.
Age
Like most cancers, the risk of bone cancer increases with age. But for some types of bone cancer, younger people have a higher risk.
Osteosarcoma is more common in adolescents (10 to 19 years). It seems to be linked to the growth of the bones during puberty.
Ewing sarcoma usually develops in children and adolescents. But it can occur in adults.
Chondrosarcomas and spindle cell sarcomas tend to occur in adults between the ages of 30 to 60.
Chordomas are more common in adults over 50 years of age.
Ionising radiation exposure
Exposure to high energy (ionising) radiation can cause cancer. This is because it can affect your cells and damage the 
.
Ionising radiation from medical tests such as x-rays or CT scans can increase your risk of developing bone cancer. But it is important you have these tests to get the right diagnosis and treatment. Your doctor balances the health risks of radiation from having these tests. Generally the health risks of radiation from tests are very low.
Having radiotherapy for cancer in the past can increase your risk of developing bone cancer. This risk is highest if you have had radiotherapy as a child. Although past radiotherapy treatment is linked to a higher risk of developing cancer. The balance of this risk is out weighed by the need to treat the original cancer.
Previous treatment with chemotherapy
People who have had treatment with chemotherapy drugs called alkylating agents have an increased risk of developing bone cancer. The risk depends on how much treatment you have had. The risk may be higher if you are having it with radiotherapy. Alkylating agents include:
- ifosfamide
- etoposide
- cisplatin
- cyclophosphamide
It's important to remember that this risk is still very small compared to the risk to your health if the cancer had not been treated.
Other bone diseases
Some types of bone disease can increase the risk of bone cancer:
Enchondroma or osteochondroma
Enchondroma or osteochondroma are non cancerous (benign) bone tumours. If you have these tumours, you are at an increased risk of getting types of bone cancer called chondrosarcoma or osteosarcoma. This is very rare.
Ollier's disease
Ollier's disease is a rare condition. It is also called enchondromatosis. People with this condition develop many non cancerous (benign) tumours in their bones. These tumours can become cancerous and can turn into chondrosarcoma.
Paget disease
People with Paget disease have an increased risk of getting osteosarcoma. Paget disease is a condition where new bone replaces old bones at a faster than normal rate.
Inherited conditions
Certain rare inherited conditions can increase the risk of developing bone cancer. These include:
Li-Fraumeni syndrome
A condition called runs in families. It is caused by a inherited from your parents. If you have Li-Fraumeni syndrome, you have an increased risk of several cancers, including osteosarcoma.
Hereditary retinoblastoma
There is a type of eye cancer also caused by faulty genes. It is called hereditary retinoblastoma. Children with this gene fault also have an increased risk of osteosarcoma.
The following syndromes are also risk factors for osteosarcoma:
- Werner syndrome
- Rothmund–Thomson syndrome
- Bloom syndrome
- Diamond Blackfan anaemia
Other possible causes
Stories about potential causes are often in the media and it isn’t always clear which ideas are supported by evidence. There might be things you have heard of that we haven’t included here. This is because either there is no evidence about them or it is less clear.
