In which deep cervical space is this tumour?
Left carotid space.
Do you remember which structures are present in the carotid space?
common carotid artery inferiorly and internal carotid artery superiorly; internal jugular vein; glossopharyngeal nerve (CN IX); vagus nerve (CN X); accessory nerve (CN XI); hypoglossal nerve (CN XII); sympathetic nerves; deep cervical lymph node chain.
The previously described left carotid space lesion, with imaging features consistent with a benign nerve sheath tumour, is again demonstrated. There is evidence of gradual growth when compared to imaging dating back three years ago. Otherwise it is unaltered in appearance, again demonstrating prominent high T2 signal peripherally and central low T2 signal, a feature which favours a neurofibroma/schwannoma. It remains well-circumscribed, no evidence of direct invasion, and no lymph node enlargement.
The internal carotid artery is displaced medially, and there is narrowing of the oropharynx. The internal jugular is displaced postero-laterally, compressed between the mass and the deep lobe of the parotid.
Conclusion: Continued gradual enlargement of the left carotid space benign nerve sheath tumour.