Publications by authors named "Sudipta Roychowdhury"

Purpose: Takayasu arteritis (TA) is a rare, chronic, inflammatory large-vessel vasculitis that affects the aorta and its main branches, including the cerebrovascular system. This review analyzes current knowledge and patient outcomes concerning the cerebrovascular implications of TA.

Methods: A literature search, with publications from 1994 to 2024, identified pertinent studies through PubMed.

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Article Synopsis
  • Carotid blowout syndrome (CBS) is a serious complication in head and neck cancer patients that can lead to rapid and severe bleeding and potentially death due to carotid artery rupture.
  • CBS has three subtypes based on the severity and characteristics of the disease, which can be determined through clinical presentations and imaging.
  • Early recognition and treatment of CBS are crucial for improving survival rates and reducing complications, which is supported by findings from a 10-year review of patients evaluated and managed for CBS at a specific medical institution.
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Background And Objectives: Recent advances in flow diverter (FD) therapy for intracranial aneurysms have highlighted the need to evaluate risk factors for in-stent stenosis (ISS), a potentially serious complication. This meta-analysis aims to identify risk factors associated with an increased risk of ISS after FD treatment.

Methods: PubMed, Web of Science, Embase, and SCOPUS databases were systematically searched for studies reporting ISS rates and risk factors after FD therapy for intracranial aneurysms.

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Transient embryonic carotid-vertebrobasilar anastomoses can intermittently persist beyond the embryonic period. These vascular anomalies are often serendipitously identified during evaluation for unrelated disease states and pathologies. The persistent proatlantal intersegmental artery is one such recognized rare fetal anastomotic connection, often arising unilaterally.

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Article Synopsis
  • The Tigertriever is an innovative stentriever designed to improve mechanical thrombectomy by allowing better user control for tackling different clot types and vessel sizes.
  • This paper combines insights from experienced professionals to evaluate the Tigertriever's capabilities and shares updated techniques for its use in clinical settings.
  • It highlights the "FLEX" approach, which promotes efficient clot integration while minimizing disruption, especially important for working in challenging distal locations.
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Endovascular coiling techniques have emerged as an alternative and effective approach for treating intracranial aneurysms. However, in some cases, previously coiled aneurysms may require secondary treatment with surgical clipping, presenting a more complex challenge compared with the initial intervention. We present the case of a 39-year-old man with a residual class III Raymond-Roy occlusion partially coiled aneurysm at the left middle cerebral artery bifurcation (Video 1).

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Anomalous vascular variants pose unique challenges in clinical management, especially in the context of neuroendovascular intervention. We present a case report detailing an extremely rare anatomic variant involving the left anterior choroidal artery, which arises proximal to the fetal posterior communicating artery. Our patient presented with confusion and speech abnormalities following a benzodiazepine overdose.

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Medium vessel occlusions (MeVOs), defined as occlusion of the M2/M3 and A2/A3 segments of the middle cerebral artery (MCA) and anterior cerebral artery, can be challenging to visualize on CT angiography (CTA) and MR angiography (MRA), given the anatomic complexity of the mid- and distal intracranial vasculature and smaller vessel caliber (Leary MC, Kidwell CS, Villablanca JP, et al. Validation of computed tomographic MCA "dot" sign: an angiographic correlation study. 2003; 34: 2636-2640; Luijten SPR, Wolff L, Duvekot MHC, et al.

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"The history of the world is the biography of the great man. And I said: the great man always acts like a thunder. He storms the skies, while others are waiting to be stormed," said Thomas Carlyle.

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Background: Long-term safety and efficacy outcomes of Surpass Evolve flow diverter (SEFD) in treatment of intracranial aneurysms are lacking. Factors predicting complete aneurysm occlusion are elusive in literature.

Methods: A retrospective review of all consecutive aneurysms treated with SEFD from February 2020 to July 2022, at a single comprehensive stroke center.

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"The only history is a mere question of one's struggle inside oneself. But that is the joy of it. One need neither discover Americas nor conquer nations, and yet one has as great a work as Columbus or Alexander to do," said David H.

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We report a case of intracranial abscesses development in a patient with head and neck cancer after emergent treatment of carotid blowout syndrome with coil embolization. Our patient is a 60-year-old male who presented with hemoptysis and hematemesis, which raised concerns for impending carotid blowout syndrome. Endovascular occlusion was successfully achieved, and the patient was discharged in stable condition.

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In this article, we describe a rare and complex case of moyamoya syndrome in a 7-year-old boy with Down syndrome and atlantoaxial subluxation. The patient presented with an ischemic stroke in the left hemisphere and cervical cord compression with increased cord edema. Diagnostic digital subtraction angiography revealed unique patterns of vascular involvement, with retrograde flow through the anterior spinal artery, ascending cervical artery, occipital artery, and multiple leptomeningeal arteries compensating for bilateral vertebral artery occlusion.

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Introduction: Evidence for improved first-pass effect with the novel radially adjustable radio-opaque stent retriever Tigertriever is lacking.

Objective: To compare improvement in first pass success with Tigertriever using two different techniques-rapid inflation deflation (RID) and suction thrombectomy (ST).

Methods: Retrospective analysis of patients with acute ischemic stroke who underwent mechanical thrombectomy with Tigertriever at a single comprehensive stroke center.

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Background: Anterior inferior cerebellar artery (AICA) aneurysms present a challenge for neurosurgeons and neurointerventionalists alike.

Methods: Cases of AICA aneurysms managed with endovascular flow diversion at our institute are reviewed with their angiographic outcomes.

Results: Both direct and indirect flow diversion provide complete aneurysm occlusion at follow-up.

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The COVID-19 pandemic led to stringent guidelines to restrict the conduct of non-emergent surgical procedures. Consequently, neurosurgery departments experienced a decline in case volumes and greater educational time being spent on virtual research projects. In our report, we reveal how neurosurgical research has changed during the pandemic compared to the pre-pandemic phase.

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Background: Surpass Streamline (SS; Stryker) is an over-the-wire first-generation flow diverter (FD). There is a scarcity of data on real-world outcomes and complications of this FD.

Methods: A retrospective review of consecutive cases between January 2019 and July 2021 at two high-volume comprehensive stroke centers, involving SS was conducted.

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Background: Reports find that magnetic resonance elastography (MRE) and shear wave elastography (SWE) can classify intracranial tumors according to stiffness. However, systematic syntheses of these articles are lacking. In this report, a systematic review and meta-analysis was performed to evaluate whether SWE and MRE can predict meningioma and glioma grades.

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Objective: Although significant advancements have been made in the detection, surveillance, and treatment of intracranial aneurysms, research and care can differ vastly based on location. Currently, there is lack of knowledge regarding the trends in literature and how the field is evolving with new technology. Here, we use bibliometric analysis to visualize the knowledge structure of the field and identify global research trends in intracranial aneurysm treatment.

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Purpose: To determine the safety and effectiveness of an expandable intravertebral implant (Spinejack; Stryker, Kalamazoo, Michigan) as a treatment option for patients with thoracolumbar spine burst fractures without fracture-related neurologic deficit.

Materials And Methods: Imaging studies before and after expandable intravertebral implantation and medical records of 33 patients, 11 (33.3%) men and 22 (66.

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