| glomus jugulare | <radiology> Most common tumour in jugular fossa with intracranial extension, origin: adventitia of jugular bulb, location: dome of jugular bulb, symptoms: tinnitus, hearing loss, findings: destruction of posterioinferior petrous pyramid and corticojugular spine, soft tissue mass in jugular bulb region, hypotympanicum, middle ear, destruction of ossicles (usually incus), otic capsule, posteromedial surface of petrous bone, MRI: salt and pepper appearance (multiple tumour vessels), angio: hypervascular mass; invasion/obstruction of the jugular bulb by thrombus/tumour; AV shunting, malignant transformation with metastasis to regional nodes (2-4%) see: paraganglioma (glomus tumour) (12 Dec 1998) |
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| glomus jugulare tumour | A paraganglioma involving the glomus jugulare, a microscopic collection of chemoreceptor tissue in the adventitia of the bulb of the jugular vein. It may cause paralysis of the vocal cords, attacks of dizziness, blackouts, and nystagmus. It is not resectable but radiation therapy is effective. It regresses slowly, but permanent control is regularly achieved. (12 Dec 1998) |
| tuberculum jugulare | An oval elevation on the cerebral surface of the lateral part of the occipital bone, on either side of the foramen magnum above the hypoglossal canal. Synonym: tuberculum jugulare. (05 Mar 2000) |
| foramen jugulare | A passage between the petrous portion of the temporal bone and the jugular process of the occipital, sometimes divided into two by the intrajugular processes; it contains the internal jugular vein, inferior petrosal sinus, the glossopharyngeal, vagus, and accessory nerves, and meningeal branches of the ascending pharyngeal and occipital arteries. Synonym: foramen jugulare, foramen lacerum posterius. (05 Mar 2000) |
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