Which patient is most likely to be diagnosed with Ewing sarcoma?

Ewing sarcoma is a type of bone cancer that primarily affects children and young adults, particularly those between the ages of 10 and 20. The demographics associated with Ewing sarcoma indicate a higher prevalence in certain populations, primarily in white males.

The correct choice highlights a 15-year-old non-Hispanic white male, which aligns with the typical age range and demographic that is most frequently diagnosed with this malignancy. The condition tends to present during periods of rapid growth, which occurs during adolescence, supporting the selection of this option.

In contrast, the other age groups and ethnic backgrounds described in the other choices fall outside the most common demographic for Ewing sarcoma. For instance, while it can occur in Hispanic, African American, or Asian individuals, these populations have lower incidence rates compared to non-Hispanic white males. Additionally, the likelihood of diagnosis decreases significantly for adults over the age of 20, making the younger patient in the correct choice the most appropriate answer in this context.