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A case of labyrinthitis diagnosed with MRI

A 91 year old woman who complained of hearing loss and episodes of persistent tinnitus followed by rotatory vertigo was referred to our radiology department for a brain MRI. She had a previous medical history of cholecystectomy and colon cancer surgically treated (hemicolectomy). Abdominal US and thoracic CT were strictly normal. Brain MRI showed frontotemporal atrophy, leukoaraiosis and a right sided frontal meningioma. In the 3D-CISS T2 sequence the left membranous labyrinth was not correctly appreciated (Fig 1), when studied in the post-gadolinum T1 sequence the left labyrinth enhances significantly (Fig 2,3) and in the T2 FLAIR sequence it is significantly brighter than the right labyrinth (Fig 4). These findings associated with the clinical symptoms were suggestive of a labyrinthitis. Discussion: