CASE HISTORY / CLINIC:
Patient with acute hearing loss on the right as well as pronounced rotatory vertigo and nystagmus to the right. Normal findings of ear microscopy.

FINDINGS:
The post-contrast T1-weighted axial image through the cerebellopontine angle (above) depicts the high signal intensity of the right cochlea as well as parts of the right labyrinth. The findings in the cochlea are better seen in the post-contrast T1-weighted coronal image (below).

DIAGNOSIS:
Cochlitis and labyrintitis most probably due to a viral infection.

DIFFERENTIAL DIAGNOSIS:
Inflammation of the inner ear structures resulting from other diseases.