The processus cochleariformis serves as the landmark for which important surgical structure during mastoidectomy?

• A Second genu of the facial nerve
• B Stapedius muscle
• C Chorda tympani nerve
• D Horizontal (tympanic) segment of the facial nerve ✓

Explanation

The cochleariform process lies just medial and anterior to the horizontal (tympanic) portion of the facial nerve. It is used as an anatomical landmark to identify this segment of the facial nerve during canal wall down mastoidectomy, reducing the risk of inadvertent nerve injury.

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

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.