Osteosarcoma characteristics can include which of the following?

Osteosarcoma characteristics can include which of the following?

• A. Sunray appearance
• B. Most common bone cancer in children
• C. Usually occurs in long bones
• D. All of the above

Answer: (D)

Osteosarcoma classically presents with a sunray (sunburst) periosteal reaction on imaging, which reflects rapid, aggressive new bone formation by malignant osteoblasts. It is the most common primary malignant bone tumor in children and adolescents, guiding the expectation that a pediatric patient with bone pain or swelling could have this diagnosis. It also has a strong preference for the metaphyseal regions of long bones, most frequently around the knee—the distal femur and proximal tibia being classic sites. When you combine these features—the sunray periosteal pattern on radiographs, the pediatric age group, and involvement of long-bone metaphyses—you’re looking at the typical presentation of osteosarcoma. That is why choosing the option that includes all of these characteristics is the best answer.