Answer and Discussion of Quiz Set: N-024

1.    What is the histologic grade of diffuse astrocytoma in the WHO classification system?

A.  I

B.  II

C.  III

D.  IV

E.  V

Answer and Discussion: The answer is B. Difffuse astrocytoma is a low-grade tumor and is WHO grade I. WHO is a 4 grade system and there is no WHO grade V.