Which of the following structures is not at immediate risk of erosion by cholesteatoma ?: (A) Long process of incus, (B) Fallopian canal containing facial nerve, (C) Horizontal/ lateral semicircular canal, (D) Base plate of stapes
Answer is D. Ans. is 'd' i.e., Base plate of stapes Cholesteatoma has the propey to destroy the bone by viue of the enzymes released by it. Structures immediately at the risk of erosion are : - Long process of incus. Fallopian canal containing facial nerve. Horizontal / lateral semicircular canal