Bone cancer is a type of cancer that starts in the bones. It can occur in any bone in the body but is most commonly found in the long bones of the arms and legs. There are different types of bone cancer, including osteosarcoma, chondrosarcoma, and Ewing sarcoma, each affecting different types of bone cells. Symptoms may include pain, swelling, and fractures. Diagnosis typically involves imaging tests like X-rays or MRIs, followed by a biopsy to confirm the presence of cancer cells. Treatment options may include surgery, chemotherapy, and radiation therapy, depending on the type and stage of the cancer. Early detection is crucial for better outcomes.