Superior Semicircular Canal Dehiscence - Stanford Hospital & Clinics
Superior Semicircular Canal Dehiscence - Stanford Hospital & Clinics
Superior Semicircular Canal Dehiscence - Stanford Hospital & Clinics
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54 y.o. man with sound-evoked vertigo and<br />
oscillopsia<br />
• History:<br />
- Sensation of motion (vertigo) when he heard loud noises in his right<br />
ear<br />
- “Fluttering vision” (oscillopsia) when he made whistling, trilling, or<br />
humming noises<br />
- No past history of otologic disease<br />
• Exam:<br />
- Negative for: spontaneous, gaze-evoked, or positional nystagmus;<br />
head-shaking induced nystagmus; head thrust sign<br />
- Normal otoscopic exam<br />
- Weber (512 Hz) lateralized to right<br />
- Normal air and bone conduction thresholds<br />
- Eye movements evoked by sound in right ear
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