Which condition is a malignant tumor of the bone?

Which condition is a malignant tumor of the bone?

• A. Osteogenesis imperfecta
• B. Osteoporosis
• C. Osteosarcoma
• D. Paget's disease

Answer: (C)

A malignant bone tumor is a cancer that forms abnormal, invasive bone tissue. The best example here is osteosarcoma, which is the most common primary malignant bone tumor. It typically arises in the metaphysis of long bones near the knee in teens and young adults, grows rapidly, and can invade surrounding tissues and spread to the lungs. What sets it apart is that the cancer produces malignant osteoid (bone-like tissue) within the tumor. In contrast, osteogenesis imperfecta is a genetic disorder causing brittle bones due to defective collagen, osteoporosis is a loss of bone density increasing fracture risk, and Paget’s disease is a disorder of abnormal bone remodeling (which is not a cancer, though it can rarely be associated with osteosarcoma). Treatment often includes chemotherapy followed by surgical management, with prognosis linked to the extent of spread and response to therapy.

A malignant bone tumor is a cancer that forms abnormal, invasive bone tissue. The best example here is osteosarcoma, which is the most common primary malignant bone tumor. It typically arises in the metaphysis of long bones near the knee in teens and young adults, grows rapidly, and can invade surrounding tissues and spread to the lungs. What sets it apart is that the cancer produces malignant osteoid (bone-like tissue) within the tumor. In contrast, osteogenesis imperfecta is a genetic disorder causing brittle bones due to defective collagen, osteoporosis is a loss of bone density increasing fracture risk, and Paget’s disease is a disorder of abnormal bone remodeling (which is not a cancer, though it can rarely be associated with osteosarcoma). Treatment often includes chemotherapy followed by surgical management, with prognosis linked to the extent of spread and response to therapy.