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Coronal T1 precontrast Coronal T1 postcontrast

Differential Diagnosis:

Glomus Jugulare

Nerve Sheath Tumor

Metastasis

Neurofibroma

Meningioma.

Originate from paraganglionic cells in numerous locations: carotid sheath, jugular bulb, middle ear

Multiple tumors in approximately 3% of spontaneous cases and 25% of familial cases

Most cases histologically benign but locally invasive.

More common in females (3:1).

Flow voids useful feature in distinguishing between other masses

“Salt & Pepper” appearance

Not always present

Intense contrast enhancement.

Lateral growth

Otologic symptoms: pulsatile tinnitus, conductive hearing loss

Medial growth

Glossopharyngeal, vagus, and spinal accessory deficits.