Osteosarcoma is described as which of the following?

Osteosarcoma is described as which of the following?

• A. Benign bone tumor
• B. Malignant tumor of cartilage
• C. Malignant tumor of skin
• D. Primary malignant tumor of bone

Answer: (A)

Osteosarcoma is a malignant tumor that originates in bone, arising from osteogenic cells and producing osteoid matrix. This makes it a primary malignant bone tumor, not a benign lesion or a tumor of cartilage or skin. It typically affects adolescents and young adults and often arises in the metaphysis of long bones like the distal femur or proximal tibia. Histology shows malignant osteoblasts producing osteoid, and clinically it presents with bone pain and swelling. Therefore, the description that best fits is a primary malignant tumor of bone.

Osteosarcoma is a malignant tumor that originates in bone, arising from osteogenic cells and producing osteoid matrix. This makes it a primary malignant bone tumor, not a benign lesion or a tumor of cartilage or skin. It typically affects adolescents and young adults and often arises in the metaphysis of long bones like the distal femur or proximal tibia. Histology shows malignant osteoblasts producing osteoid, and clinically it presents with bone pain and swelling. Therefore, the description that best fits is a primary malignant tumor of bone.