How long does chemotherapy take to work for osteosarcoma?

Osteosarcoma treatment often places chemotherapy before and after surgery. Before surgery, scans can track the bone tumour and any areas outside the bone. At surgery, the removed tumour can provide additional information about how much of it was affected, although that result is not available at the start. A smaller mass is only one part of the picture: the team also considers mobility, pain, blood results and whether the disease has spread.

Attend blood tests and appointments on the dates arranged, and report pain, reduced movement, nausea, mouth soreness or signs of infection. Protect the affected limb as advised by the orthopaedic and oncology teams; do not add strenuous exercise without guidance. Write down medicines and symptoms so the team can distinguish treatment effects from changes related to the bone tumour. Ask how chemotherapy, surgery and rehabilitation fit together.

Call the treatment team urgently for fever, shaking chills, persistent vomiting, inability to drink, unusual bleeding or sudden worsening pain or swelling. Seek emergency care for severe breathlessness, fainting or sudden chest pain. If a limb becomes suddenly weak, cold or much more painful, seek immediate advice rather than waiting for the next appointment.

When will imaging be repeated? Will the surgical specimen add response information? What changes would alter the chemotherapy plan? Which activity limits apply before and after surgery?