Osteosarcoma is most commonly diagnosed in patients in which age range?

• A. 30-50
• B. <30
• C. 50-70
• D. >70

Answer: (B)

Osteosarcoma most often arises during periods of rapid bone growth, which is in children and adolescents. The peak incidence occurs in the teen years (roughly 10–20), with cases continuing into early adulthood but becoming much less common after that. This makes the under-30 range the best fit for the most common diagnosis. In older adults, osteosarcoma is rarer and often secondary to conditions like Paget disease or prior radiation, which explains why higher age ranges are much less typical. So, the age range under 30 is the one in which this tumor is most commonly diagnosed.