Bone tumors are abnormal growths of tissue in the bones. They can be either benign (non-cancerous) or malignant (cancerous). Benign tumors, like osteochondromas, usually do not spread and may not require treatment unless they cause pain or other issues. Malignant tumors, such as osteosarcoma, can be aggressive and may spread to other parts of the body. Symptoms of bone tumors can include pain, swelling, and fractures. Diagnosis often involves imaging tests like X-rays or MRI, and sometimes a biopsy is needed to determine the type of tumor. Treatment options may include surgery, chemotherapy, or radiation therapy, depending on the tumor's nature.