This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
Treatment of choice for CSOM with vertigo and facial nerve palsy is: 
Select and explain. 
A. Antibiotics and labyrinthine sedatives, B. Myringoplasty, C. Immediate mastoid exploration, D. Labyrinthectomy
C: Immediate mastoid exploration
Answer: C: Immediate mastoid exploration 
Explanation: (c) Immediate mastoid exploration(Ref. Shambaugh, 6th ed., 448)This is an unsafe CSOM. Here cholesteatoma eroding fallopian canal and causing fistula formation on the medial wall of middle ear (lateral semicircular canal, promontory, oval window) is causing facial nerve palsy and vertigo respectively. So the management is immediate mastoid exploration to remove cholesteatoma.