True about cholesteatoma:
a. Benign tumourb. Bone erosion present
c. MC cause of conductive deafness
d. Found in apex of petrous bone commonly
e. Contains cholesterol
Ans: (B) Bony erosion present
* Congenital cholesteatoma occurs in 3 important sites :
- middle ear
- petrous apex
- C.P. angle
Primary & secondary acquired cholesteatoma mainly seen in
middle ear & later on invades the inner ear.
