A patient with suspected vestibular schwannoma on MRI undergoes audiovestibular testing. On VNG, the caloric test shows complete absence of response on the right side. Which VEMP finding would be expected in the right ear?

• A Absent cVEMP and absent oVEMP on the right
• B Absent cVEMP with normal oVEMP on the right ✓
• C Normal cVEMP with absent oVEMP on the right
• D Both cVEMP and oVEMP normal on the right

Explanation

Vestibular schwannoma typically arises from the inferior vestibular nerve at the cerebellopontine angle. The inferior nerve supplies the saccule (tested by cVEMP) while the superior nerve supplies the crista of the posterior canal (tested by caloric) and the utricle (tested by oVEMP). Complete caloric loss with absent cVEMP but preserved oVEMP localizes the lesion to the inferior nerve.

Reference: Vertigo: Clinical Practice and Examination, 1st ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.