A glomus vagale tumour is a subset of glomus tumours which occur along the path of the vagus nerve (CN X). They are a subset of extra-adrenal neuroendocrine tumours that are derived from the nonchromaffin paraganglion cells.
Typically presents as a painless mass behind the carotid artery. Vocal cord paralysis is a relatively frequent finding ( ~ 47% 3 ).
Although they could occur at a similar position to carotid body tumours they tend to be more rostrally in location. They displace the ICA and ECA anteriorly and the IJV posteriorly 1.
Difficult to sonographically differentiate between other lesions that can potentially occur in this location. May be seen as a solid heterogeneously hypoechoic lesion comprosing of small vascular structures 3.
- T1 : usually low signal
- T2 : high signal with multiple flow voids which may give a salt and pepper appearance
The differential for lesions in this location include
- 1. J Weissman, Case 21: Glomus Vagale Tumor, Radiology, 215, 237-242, April 2000
- 2. Dimitris T. Kehagias et.al, Schwannoma of the Vagus Nerve, AJR 2001; 177:720-721
- 3. Francesco Giovagnorio and Carlo Martinoli, Sonography of the Cervical Vagus Nerve, Normal Appearance and Abnormal Findings, AJR 2001; 176:745-7493
Synonyms & Alternative Spellings
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