In modified radical mastoidectomy (Bondy operation), which structure is preserved that distinguishes it from a radical mastoidectomy?

• A The posterior canal wall is retained
• B The tympanic membrane and ossicular chain are left intact ✓
• C The stapes and facial recess mucosa are preserved
• D The mastoid antrum is not opened

Explanation

In modified radical mastoidectomy (Bondy's operation), the attic cholesteatoma is removed while the tympanic membrane remnant and ossicular chain (particularly when hearing is intact) are preserved, maintaining a functional middle ear cleft. This contrasts with radical mastoidectomy where the posterior canal wall, remnant tympanic membrane, malleus, incus, and middle ear mucosa are all sacrificed, creating a single open cavity. Bondy's procedure is indicated for attic cholesteatoma with intact pars tensa.

Reference: Dhingra Diseases of Ear, Nose and Throat, 7th ed.

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Written and medically reviewed by the StethoPrep medical team.