Presentation
Recent subarachnoid hemorrhage
Patient Data
Age: 50 years
Gender: Male
From the case:
Blood blister-like aneurysm
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Broad based bulge (blood blister like) projects at the dorsal/lateral wall of the supraclinoid portion of the right internal carotid artery just its bifurcation. It measures about 4mm in maximum diameter. It has a wide neck.
From the case:
Blood blister-like aneurysm
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Blood-blister like aneurysm (arrows)
Case Discussion
Blood blister-like aneurysm is a broad-based bulge at a nonbranch point of a vessel.
Clinical presentation
Middle-aged patients, angiographically negative for subarachnoid hemorrhage.
Radiographic features
- shape: blood blister-like or half-domed shallow outpouching with wide neck
- common sites: supraclinoid ICA (dorsal wall), less likely MCA, ACA, basilar artery
- size: usually small (<6mm) mean (3mm) 1
- rapid change in size and morphology on follow up angiograms
- CT angiography: often negative
- digital subtraction angiography: the best diagnostic tool
Differential diagnosis
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