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FIG 1. Axial helical CT images without (A) and with (B) intravenous contrast material at the level of the oropharynx.
A, Note a well-defined isodense left mass (M), in the parapharyngeal space, with eggshell calcification abutting the oropharyngeal lumen. Another mass is also seen on the right side.
B, Central round vascular enhancement is seen in the arterial phase of contrast administration, consistent with the patent lumen of the aneurysm. There is also aneurysmal dilation of the right internal carotid artery and tortuosity and aneurysmal dilatation of the left vertebral artery (arrow)
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