Blood blister-like aneurysm
Blood blister-like aneurysm is a broad based bulge at non-branch point of a vessel.
Focal arterial wall defect covered with fibrous tissue.
- 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 (<6 mm) with a mean of 3 mm 1
- rapid change in size and morphology on follow-up angiograms
- CT angiography: often negative
- digital subtraction angiography: is the best diagnostic tool
Treatment and prognosis
These aneurysms are difficult to treat:
- endovascular coiling is difficult secondary to its small size and wide neck
- surgical clipping/wrapping is at high risk of rupture of the aneurysm or internal carotid laceration during surgery
- 1. Osborn AG, Salzman KL, Barkovich AJ. Diagnostic Imaging. Lippincott Williams & Wilkins. (2009) ISBN:1931884722. Read it at Google Books - Find it at Amazon
- 2. Gaughen JR, Raghavan P, Jensen ME et-al. Utility of CT angiography in the identification and characterization of supraclinoid internal carotid artery blister aneurysms. AJNR Am J Neuroradiol. 2010;31 (4): 640-4. doi:10.3174/ajnr.A1893 - Pubmed citation
- 3. Park JH, Park IS, Han DH et-al. Endovascular treatment of blood blister-like aneurysms of the internal carotid artery. J. Neurosurg. 2007;106 (5): 812-9. doi:10.3171/jns.2007.106.5.812 - Pubmed citation