Commonest complication of CSOM is: (A) Subperiosteal abscess, (B) Mastoiditis, (C) Brain abscess, (D) Meningitis
Answer is C. 50% of brain abscesses in adults and 25% in children are otogenic in origin. In adults, an abscess usually follows CSOM with cholesteatoma. (Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 90)