Overview
Malignant bone tumors are cancers such as osteosarcoma, chondrosarcoma, or Ewing sarcoma.

Symptoms
Persistent bone pain, swelling, and sometimes a mass or fractures.

Diagnosis
Imaging and biopsy are required to confirm diagnosis and guide treatment.

Treatment
Depends on tumor type and stage; may include surgery, chemotherapy, and radiation.

When to seek care
Persistent bone pain, swelling, or a growing mass should be evaluated urgently.