From the case:
Internal carotid aneurysm - giant
Axial non-contrast
Non-contrast CT demonstrates a well-circumscribed hyperdensity mass with peripheral calcification and internal heterogeneous density.
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Sagittal C+ arterial phase
Selected images from a CT angiogram confirm the diagnosis of a giant ICA aneurysm with mural thrombosis.
From the case:
Internal carotid aneurysm - giant
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Frontal Internal carotid artery
Catheter angiogram of the demonstrates the much small lumen of this giant ICA aneurysm.
From the case:
Internal carotid aneurysm - giant
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Axial T2
Selected images from an MRI demonstrate the low T2 signal of flowing blood and thrombus.
Case Discussion
Giant internal carotid artery aneurysm, mostly thrombosed. The term "giant" is typically applied when the aneurysm measures more than 25 mm.