Final answer:
Osteochondroma is commonly diagnosed in individuals between the ages of 10 to 30 years.
Step-by-step explanation:
Osteochondroma is a benign tumor that forms near the ends of long bones, typically during childhood or adolescence. The age at which 75% of patients are seen with osteochondroma varies depending on the specific study or population being examined. However, it is commonly observed in individuals between the ages of 10 to 30 years. This means that a majority of patients with osteochondroma are typically diagnosed within this age range.