Blister Aneurysm of the Internal Carotid Artery

Author(s):  
Peter Nakaji ◽  
Michael R. Levitt

Abstract: Blister aneurysms are a rare cause of subarachnoid hemorrhage. They are easily overlooked on conventional imaging and catheter angiography due to their small size and unusual anatomic location. Whereas the medical management of subarachnoid hemorrhage is similar to that of saccular aneurysms, the surgical management of blister aneurysms is more challenging due to their unique pathology and higher risk of intraoperative rupture. Special consideration should be made for open management such as preparation of the option of bypass or the emerging use of endovascular techniques such as flow diversion. This chapter reviews the diagnosis and medical and surgical management of blister aneurysms.

Author(s):  
Spyros Papadoulas ◽  
Konstantinos Moulakakis ◽  
Natasa Kouri ◽  
Petros Zampakis ◽  
Stavros K. Kakkos

AbstractWe present a patient suffering from a stroke with a free-floating thrombus extending up to the distal internal carotid artery. The thrombus was totally resolved after a 2-week anticoagulation regimen without leaving behind any severe residual stenosis in the carotid bulb. The optimal treatment of this rare condition remains uncertain. We report some important treatment strategies that have been used in the literature, emphasizing the anticoagulation as the mainstay of therapy. Immediate surgical and interventional manipulations carry the risk of thrombus dislodgement and embolization and should be considered if there are recurrent symptoms despite medical management.


Author(s):  
Hashaam Arshad ◽  
Zhenhua Gui ◽  
Dakota Owens ◽  
Binod Wagle ◽  
Charles Donohoe

Introduction : A 51‐year‐old lady with a past medical history of Essential Hypertension, Hypothyroidism, prior Herpes Zoster infection 8 weeks ago was admitted with complaints of abdominal pain, bilateral flank pain, and restlessness. Her initial workup was significant for hyponatremia and hypokalemia. On the 3rd day of admission, she developed acute hypoxemic respiratory failure which led to intubation. At that time, CTA Chest was not done but CT Chest revealed prominent mucous plugging with left side glass ground opacities, Ultrasound of lower extremities revealed right common femoral vein DVT which led to concerns that she may have suffered from Pulmonary Embolism and led to starting Heparin drip. On the 6th day of admission, she developed Acute Encephalopathy, MRI Brain revealed acute infarcts in bilateral cerebral cortices and cerebella, CT Angiogram Head showed acute subarachnoid hemorrhage in the high posterior right parietal lobe, stenosis of the right high cervical internal carotid artery, and irregular, the appearance of the arterial vasculature throughout and CT Angiogram Neck abrupt change in caliber of the right ICA, 1.5 cm distal to the bifurcation with markedly severe narrowing of the majority of the extracranial right ICA throughout its course. A cerebral Angiogram was done which showed diffuse tandem segments of tandem cervical and intracranial portions of the right internal carotid artery and she was given nitroglycerin was administered as a therapeutic intervention. Lumbar Puncture showed WBC 2, RBC 7, Protein 162, Glucose 64, VZV PCR was negative, CSF VZV IgG Antibody positive at 303 IV (>165 IV indicative of current or past infection). Serum VZV IgG Antibody was positive at >4000 IV. Infectious Diseases were consulted after Lumbar Puncture, they initially started Acyclovir but once the Serum VZV IgG Antibody came back much higher than Serum VZV IgG Antibody levels, their assessment was that VZV vasculitis is unlikely and Acyclovir was discontinued. Eventually, the case was discussed at Neuroradiology which led to us getting a repeat MRA Neck without contrast which showed a concentric T1 and T2 hyperintensity along with a small and irregular caliber right cervical ICA consistent with dissection. She eventually completed a 21‐day course of Nimodipine due to underlying Subarachnoid Hemorrhage. Methods : NA Results : NA Conclusions : Our case demonstrates how it can become difficult to ascertain the etiology of stroke in certain patients. Our patient presented with multiple non‐specific symptoms initially and it was later on due to her Acute Encephalopathy that her Strokes and Subarachnoid Hemorrhage were discovered. It is still difficult to pinpoint whether the cause of strokes was dissection or VZV infection. Lumbar Puncture remains an essential tool to complete work up on uncommon etiologies of stroke.


2002 ◽  
Vol 59 (2) ◽  
pp. 125-130 ◽  
Author(s):  
Zoran Roganovic ◽  
Goran Pavlicevic

Objectives: The aim was to analyze the risk factors for intraoperative rupture (IR) of cerebral aneurysm and for temporary clips (TC) use, as well as their influence on the final postoperative outcome. Methods: Retrospective study was done 72 IR patients, and on 75 TC patients. For patients with or without IR, as well as for the patients with or without TK, outcome of the treatment aneurysm size and localization, preoperative clinical state and operative timing was analyzed, and statistical significance of obtained differences was tested. Results: IR occurred in 40% of anterior cerebral artery aneurysms and in 16.7% of internal carotid artery aneurysms (p>0.05), while TCs were used in 52% of middle cerebral artery aneurysms and 34.8% of internal carotid artery aneurysms (p>0.05). Average size was 17.3 mm for aneurysms with IR and 11.7 mm for those without IR (p>0.05). Aneurysms were significantly larger in patients with TCs, than in patients without TCs (16.7 mm and 9.4 mm respectively, p<0.05). Preoperative period was 10.2 days for patients with IR, and 16.8 days for patients without IR (p<0.05). Favorable outcome was observed in 71.4% of patients with IR and in 70.6% of those without IR, as well as in 76.4% of patients who required TC and in 75.6% of cases without TC (p>0.05). Average duration of temporary occlusion was 5.8 min for patients with favorable outcome and 15 min for patients with poor outcome (p<0.05). Conclusions: Incidence of IR mostly depended on the duration of preoperative interval, while the frequency of TC use depended mostly on aneurysm size. IR did not influence the surgical outcome, as well as TC use, if the occlusion was shorter than 8-10 min.


Neurosurgery ◽  
2017 ◽  
Vol 80 (2) ◽  
pp. 235-247 ◽  
Author(s):  
Christopher M. Owen ◽  
Nicola Montemurro ◽  
Michael T. Lawton

Abstract BACKGROUND: Blister aneurysms of the supraclinoid internal carotid artery (ICA) are challenging lesions with high intraoperative rupture rates and significant morbidity. An optimal treatment strategy for these aneurysms has not been established. OBJECTIVE: To analyze treatment strategy, operative techniques, and outcomes in a consecutive 17-year series of ICA blister aneurysms treated microsurgically. METHODS: Seventeen patients underwent blister aneurysm treatment with direct clipping, bypass and trapping, or clip-reinforced wrapping. RESULTS: Twelve aneurysms (71%) were treated with direct surgical clipping. Three patients required bypass: 1 superficial temporal artery to middle cerebral artery bypass, 1 external carotid artery to middle cerebral artery bypass, and 1 ICA to middle cerebral artery bypass. One patient was treated with clip-reinforced wrapping. Initial treatment strategy was enacted 71% of the time. Intraoperative rupture occurred in 7 patients (41%), doubling the rate of a poor outcome (57% vs 30% for patients with and without intraoperative rupture, respectively). Severe vasospasm developed in 9 of 16 patients (56%). Twelve patients (65%) were improved or unchanged after treatment, and 10 patients (59%) had good outcomes (modified Rankin Scale scores of 1 or 2). CONCLUSION: ICA blister aneurysms can be cautiously explored and treated with direct clipping as the first-line technique in the majority of cases. Complete trapping of the parent artery with temporary clips and placing permanent clip blades along normal arterial walls enables clipping that avoids intraoperative aneurysm rupture. Trapping/bypass is used as the second-line treatment, maintaining a low threshold for bypass with extensive or friable pathology of the carotid wall and in patients with incomplete circles of Willis.


2008 ◽  
Vol 255 (12) ◽  
pp. 1985-1987 ◽  
Author(s):  
K. Hüttemann ◽  
T. Nowe ◽  
T. Engelhorn ◽  
A. Doerfler ◽  
P. D. Schellinger ◽  
...  

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