Glomus tympanicum paraganglioma

Case contributed by Dr Ian Bickle

Presentation

Pulsatile tinnnitis. Mixed hearing loss. Reddish lesion anteroinferior aspect of tympanic membrane.

Patient Data

Age: 40
Gender: Female
MRI

8mm well-defined high T2, avidly enhancing soft tissue mass lateral to the right cochlear promontary and posterior to the tympanic membrane.

No internal cystic change or flow voids.

Fluid in the right mastoid air cells.

Reactive internal jugular chain lymph nodes.

8mm well defined soft tissue mass lateral to the right cochlear promontary and posterior to the tympanic membrane.

No bony erosion.  No extension into the inner ear.

Obstructive fluid partially opacifies the right mastoid air cells.

Ossicular chain normal.

Case Discussion

A nice example of a small glomus tympanicum paraganglioma (a.k.a. glomus tympanicum), which correlates well with the patient demographics and clinical assessment.

The typical appearances are of a well defined mass with its base on the cochlear promontory, which avidly enhances on MRI.

It is the most common tumour of the middle ear.

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Case information

rID: 54557
Case created: 15th Jul 2017
Last edited: 1st Aug 2017
System: Head & Neck
Inclusion in quiz mode: Included

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