PMC3639700_01
Variations in ear canal volume due to pulsating tympanic membrane.
CRIM.OTOLARYNGOLOGY2013-934386.001.jpg
PMC3639700_01_CRIM.OTOLARYNGOLOGY2013-934386.001.jpg
fig1
Pure tone audiometry results were consistent with physiological hearing loss, and an attempted long time based tympanometry was suggestive of tympanic pulsation (Figure 1).
Isolated bilateral ION enlargement without accompanying brainstem or cerebellar pathology.
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PMC3639700_01_CRIM.OTOLARYNGOLOGY2013-934386.002.jpg
fig2
Primary brain imaging (MRA) showed a high bilateral T2 signal with subtle mass effect on the expected position of the olivary nuclei, a finding that is consistent with HOD (Figures 2(a) and 2(b)).