Answer and Discussion of Quiz Set: N-006

1.    In the World Heatlh Organization (WHO) classification of brain tumors, how many grades are there in meningioma?  Answer

A.  I

B.  II

C.  III

D.  IV

E.  V

Answer and Discussion: The answer is (C). Although the WHO classification for brain tumors has 4 grade (I to IV), meningioma, atypical meningioma, and anaplastic meningioma comprise only three grades. There is no grade IV tumor for meningioma. The WHO system does not have grade V.