Publications by authors named "Sagar Oak"

Congenital absence of Internal Carotid Artery (ICA) is a rare anomaly seen in <0.01% of the population. Various collateral circulations develop in these cases to maintain adequate cerebral perfusion.

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Background: A2 aneurysms are rare with a reported incidence of <1% of the intracranial aneurysms. These aneurysms are located between the anterior communicating artery and genu of the corpus callosum. Fusiform aneurysms in this location are even rarer and we present one such case of fusiform A2 aneurysm treated with endovascular technique.

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Background: Cerebrovascular lesions are uncommon in neurofibromatosis type 1 (NF1).

Case Description: We report a case of 34-year-old man with NF1 who developed posterior circulation stroke. Diffusion-weighted imaging showed acute infarcts in the right vertebra basilar artery territory.

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Background And Purpose: To demonstrate the safety and efficacy of balloon-expandable intracranial stents in patients with intracranial atherosclerotic lesions (>70% stenosis) who were symptomatic despite being on optimum medical therapy.

Methods: Between April 2004 and May 2012, 182 patients underwent intracranial stenting in our institution. All patients had symptoms despite being on optimum medical therapy.

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Aneurysms in the pediatric age group are rare and have preponderance for the posterior circulation. These aneurysms are more commonly large, giant, and complex. We present two case reports of saccular aneurysms in pediatric patients who were treated successfully by endovascular technique.

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Objectives: Simultaneous bilateral carotid artery stenting (SBCAS) is a challenging procedure, and selection criteria play an important role in determining the final outcome. The aim of the present study was to determine the efficacy and safety of the SBCAS in a series of 9 patients with significant bilateral carotid artery disease (>50% on the symptomatic side and >60% on the asymptomatic side).

Materials And Methods: The present study is a retrospective study of 9 patients from January 2005 to December 2012 in a tertiary care center.

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The incidence of pediatric aneurysms is rare compared to that of the adults. The natural history and the course of these aneurysms were not well understood. We present a rare case of spontaneously thrombosed basillar tip nongiant aneurysm in a 9-year-old male child who presented with symptoms of mass effect and subsequently followed up by imaging over a period of 1 year.

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Background: To evaluate the safety and efficacy of stent-assisted coiling of ruptured intracranial wide-necked aneurysms in a setting of acute subarachnoid hemorrhage, without compromising on the antiplatelet regimen.

Methods: Forty-two consecutive patients who underwent stent-assisted coiling for ruptured wide-necked intracranial aneurysms from August 2008 to May 2012 were studied. Demographic data like age, sex, Hunt & Hess grade, Fischer scale, and location, and size of the aneurysms were noted.

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Introduction: We present a rare finding of a 'corkscrew appearance' of the distal cerebral vessels in a young Asian woman who presented with acute stroke.

Case Presentation: A 32-year-old Asian woman presented with a 3-month history of recurrent right-sided transient ischemic attacks. Her clinical workup and brain imaging results were normal.

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Distal superior cerebellar artery (SCA) aneurysms are rare. Fusiform aneurysms of SCA are rarer and more challenging to treat. Parent artery occlusion by endovascular coiling is the treatment option for these cases.

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In the present study, we discuss the accuracy of digital subtraction angiography (DSA) in diagnosis of thrombus in the common carotid artery and its role in the medical management of this disorder. Between 2006 and 2011, four patients (age group ranging from 26 to 48 years) presented to our institution with symptoms of stroke. DSA in all these patients showed cigar-shaped filling defect in the common carotid artery.

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