Fig. 14.

Bilateral vestibular loss (superficial siderosis). Bilateral audiovestibular loss in a patient with superficial siderosis. The oVEMP and cVEMP reflexes are absent bilaterally, with vHIT results showing significantly reduced gains and catch-up saccades in all six semicircular canals. The audiogram shows a sloping mild to profound sensorineural hearing loss bilaterally. MRI of the brain shows haemosiderin deposition over the brainstem and spinal cord (arrows). Subjective visual horizontal test is normal.