What should you know about malignant osteosarcoma?

Osteosarcoma often begins in a long bone near a joint, although it can arise elsewhere. Persistent bone pain, swelling, reduced movement or a fracture after a minor injury may occur. These findings can have other causes, so they do not by themselves confirm cancer.

X-rays and other scans show the bone lesion and nearby tissues. A carefully planned biopsy examines the cells. The team may also assess the chest and other areas because osteosarcoma can spread beyond the original bone.

Ask to be seen by a sarcoma team before biopsy or surgery. Chemotherapy may be given before or after an operation to treat cancer cells beyond the visible mass. Tumour removal surgery aims to remove the tumour while preserving useful limb function when possible; reconstruction or rehabilitation may be part of recovery.

Use mobility aids exactly as advised and protect the affected limb from unnecessary strain. Tell the team about pain, numbness, swelling, medication effects and changes in walking or daily tasks.

Seek urgent assessment for sudden severe bone pain, a new inability to use the limb, a suspected fracture, rapidly increasing swelling, numbness or a cold or pale hand or foot. During chemotherapy, fever, repeated vomiting, dehydration or unusual bleeding needs prompt medical advice.

Where is the tumour and what does the biopsy show? Has imaging checked the chest and other bones? What is the purpose and timing of chemotherapy? What operation and reconstruction are possible? How will pain, mobility, fertility and rehabilitation be supported?