Osteosarcoma accounts for what percentage of canine primary bone tumors?

Osteosarcoma accounts for what percentage of canine primary bone tumors?

• A. 25-40%
• B. 50%
• C. 10-20%
• D. 75-90%

Answer: (D)

Osteosarcoma is the most common primary bone tumor in dogs, making up the vast majority of these tumors. In clinical canine oncology, roughly three-quarters to nine-tenths of primary bone tumors are osteosarcomas, with many sources citing about 85%. That’s why the best choice is the 75-90% range—it reflects that OS overwhelmingly dominates the landscape of canine primary bone tumors. The other percentages would imply OS is only a minority or a significant minority, which doesn’t align with how frequently it occurs compared with other primary bone tumor types.

Osteosarcoma is the most common primary bone tumor in dogs, making up the vast majority of these tumors. In clinical canine oncology, roughly three-quarters to nine-tenths of primary bone tumors are osteosarcomas, with many sources citing about 85%. That’s why the best choice is the 75-90% range—it reflects that OS overwhelmingly dominates the landscape of canine primary bone tumors. The other percentages would imply OS is only a minority or a significant minority, which doesn’t align with how frequently it occurs compared with other primary bone tumor types.