Critical Care Registered Nurse (CCRN) Practice Exam

What age range is most commonly affected by oligoastrocytoma?

1. 0-20 years

2. 20-40 years

3. 30-50 years

4. 40-50 years

The correct answer is: 40-50 years

Oligoastrocytomas are classified as a type of glioma, which is a tumor that arises from glial cells in the brain. These tumors are more commonly found in adults rather than in children, with the highest incidence occurring in adults aged 30 to 50 years. This age range is significant because it reflects the typical presentation of these tumors, aligning with the biological behavior and the peak ages of diagnosis. In this context, the age range of 40-50 years represents a subcategory of this common demographic and highlights the typical clinical presentation. It is known that younger individuals, particularly those under 20 years, demonstrate a much lower incidence of these tumors. Thus, the correct choice captures the most commonly affected population for oligoastrocytomas, emphasizing the prevalence of these tumors in this specific adult age range.