Glomus tympanicum paraganglioma
Long date progressive dizziness and hearing loss on the right.
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Tumour slightly high on T2 and FLAIR, with vivid contrast enhancement, partially obliterating the right middle ear, extending through the hypotympanum, surrounding the cochlear promontory until reaching the carotid canal. It contours and spares the cochlea. The mastoid adytum is obliterated causing mastoiditis on the right.
The imaging features are those of a glomus tympanicum paraganglioma, which is the most common tumour of the middle ear cavity. Unfortunately, this case was not confirmed histologically and this diagnosis is just supported by the radiological characteristics.