Glomus jugulotympanicum paraganglioma

Case contributed by Bruno Di Muzio


Previous history of melanoma, erosive petrous bone lesion found on CT brain (not shown).

Patient Data

Age: 50 years
Gender: Male



At the left petrous apex region, expanding the jugular foramen and extending into the left middle ear cavity, there is a vividly enhancing solid mass with elevated T2 signal and scattered flow-voids. The lesion has a subcentimeter protrusion abutting the cerebellum in the cerebellopontine angle. Partial obliteration of the mastoid air cells on the left. 

Preserved left ICA flow-voids. Dural venous sinuses are patent, with normal opacification of the left sigmoid sinus and favorable torcular anatomy with good communication between both transverse sinuses. 

PET-CT (Gallium-68 DOTATATE)

Nuclear medicine

Left petrous bone lesion is intensively octreotate avid, which is best explained by a glomus jugulotympanicum paraganglioma given the MRI appearances. 

Case Discussion

Although the imaging features on MRI were quite suggestive of a glomus tumor, given the history of melanoma, functional imaging with a Gallium-68 DOTATATE PET CT was performed. 

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