Browsing by Author "Varma, DR"

Now showing 1 - 11 of 11
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    Absence of the left common carotid artery with cervical origin of the right subclavian artery
    (AMERICAN JOURNAL OF NEURORADIOLOGY, 2006)
    We report the case of a 1(1)/(2)-year-old female child, who developed symptomatic hemorrhage from major aorto-pulmonary collaterals after surgery for Tetrology of Fallot. During the course of embolization of the aorto-pulmonary collaterals, we discovered the presence of direct origin of the left internal and external carotid arteries from the aortic arch. Further, there was cervical origin of right subclavian artery. We discuss the clinical significance and potential embryological mechanism in development of this anomaly.
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    Cerebral myxomatous angiopathy. Imaging features
    (RIVISTA DI NEURORADIOLOGIA, 2004) Sonwalkar, HA; Gupta, AK; Varma, DR; Purkayastha, S; Bodhey, N; Kesavadas, C
    Strokes due to embolization from a cardiac myxoma are rare. Myxomatous cerebral emboli can cause occlusion of intracranial vessels or oncotic aneurysm formation. We describe a case of cardiac myxoma presenting with stroke having bilateral cerebral infarct and oncotic aneurysm formation. Myxomatous emboli have characteristic CT, MR and angiography findings, which are well seen in this case. The pathogenesis, imaging features, clinical presentation and natural history are discussed.
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    Chordoid meningioma mimicking tuberculoma
    (RIVISTA DI NEURORADIOLOGIA, 2005) Purkayastha, S; Gupta, AK; Varma, DR; Radhakrishnan, V
    Meningiomas are common extra-axial brain tumors presenting a bewildering variety of histopathological patterns. The rare subtypes seldom demonstrate the imaging features classically described for meningiomas. Here we present the imaging features of rare histological varieties of meningiomas.
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    Chordoid meningioma: A report of two cases
    (NEUROLOGY INDIA, 2003)
    Chordoid meningioma is an uncommon histopathological variant of meningioma. We report 2 cases of chordoid meningioma occurring in adult patients.
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    CT angiographic demonstration of agenesis of the internal carotid artery with transsellar cavernous collateral and PCA aneurysm
    (RIVISTA DI NEURORADIOLOGIA, 2004) Bodhey, NK; Gupta, AK; Varma, DR; Sonwalkar, HA; Purkayastha, S
    We report an unusual case of complete agenesis of the right internal carotid artery (ICA) with transsellar anastomosis from the cavernous segment of the contralateral ICA and presence of a posterior cerebral artery aneurysm and aberrant origin of the right subclavian artery.
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    Embolization of choroid plexus arteriovenous malformation. A case report
    (RIVISTA DI NEURORADIOLOGIA, 2005) Gupta, AK; Varma, DR; Bodhey, NK; Purkayastha, S
    Choroid plexus arteriovenous malformations are rare lesions that usually present with intraventricular hemorrhage. Management of these lesions is challenging as their deep location makes them relatively inaccessible for surgical excision. Recent advances in microcatheter technology have made it possible to access these lesions safely for embolization. We report a case of lateral ventricular choroid plexus arteriovenous malformation completely occluded by endovascular treatment.
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    Evaluation, management, and long-term follow up of vein of Galen malformations
    (JOURNAL OF NEUROSURGERY, 2006) Gupta, AK; Rao, VRK; Varma, DR; Kapilamoorthy, TR; Kesavadas, C; Krishnamoorthy, T; Thomas, B; Bodhey, NK; Purkayastha, S
    Object. Vein of Galen malformations (VGMs) are extremely rare intracranial lesions. Clinical presentation and management strategies vary significantly in different areas of the world. The authors report their experience in evaluation, management, and long-term follow up of these lesions in India. Methods. Between October 1983 and June 2003, 25 patients with VGMs were referred to the authors' institution for evaluation and management. Ten children younger than 2 years of age presented with rapidly increasing head size as the chief complaint. Among 11 children 2 years of age or older, the most common presenting symptom was chronic headache. Four patients who presented during adulthood had chronic headache for many years before presentation. Angiographic evaluation of the lesion was performed in 21 patients. Fifteen patients were treated using endovascular techniques. Injection of the embolic material was performed after induction of systemic hypotension when the flow in the fistula was high. Complete occlusion of the arteriovenous shunt could be achieved in two patients with vein of Galen aneurysmal dilation (100% of patients with this type of malformation) and in five of the six patients with the mural type of malformation (83%). Among patients with the choroidal type of malformation, complete obliteration of the shunt could be achieved in three patients. In three patients with high-flow choroidal malformations, embolization carried out in a single sitting resulted in shunt reduction of nearly 90%. These patients received clinical follow up. Conclusions. The authors' experience in evaluation and management of VGMs reveals that in areas of the world where access to dedicated specialist care is limited, the clinical presentation of VGMs can differ appreciably from the classic descriptions in the literature. Endovascular management of these lesions results in excellent angiographic and clinical results.
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    High-flow traumatic carotico-jugular fistula manifesting as venous hypertensive encephalopathy - A case report
    (INTERVENTIONAL NEURORADIOLOGY, 2005)
    We report the clinical and angiographic findings in a patient who presented with venous hypertensive encephalopathy secondary to a traumatic carotico-jugular fistula. Endovascular entrapment of the fistula by occluding the common carotid artery and internal jugular vein at the base of the skull resulted in near total improvement of the patient's neurological status.
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    Magnetic resonance imaging in temporal lobe epilepsy
    (RIVISTA DI NEURORADIOLOGIA, 2003) Kapilamoorthy, TR; Kesavadas, C; Gupta, AK; Radhakrishnan, VV; Varma, DR
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    Vein of Galen malformations - An Indian experience
    (RIVISTA DI NEURORADIOLOGIA, 2003) Gupta, AK; Rao, VRK; Joseph, S; Kapilamoorthy, TR; Bejoy, B; Thomas, BB; Varma, DR
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    Vein of Galen malformations: Review
    (NEUROLOGY INDIA, 2004)
    Vein of Galen malformations are unique congenital malformations of the cerebral vasculature that result in persistence and 'aneurysmal' dilatation of the venous structures. The varied clinical presentations and their distinctive and complex angioarchitecture make it important for the caring physician to understand their embryological and pathophysiological aspects. Management of these lesions - both in the neonatal period and at the time of definitive intervention, is challenging. Considering the rarity of these lesions, there are very few studies that have been able to compare the results of different techniques in the management. Continuing developments in the diagnostic as well as interventional aspects during the last two decades have radically changed the management of these lesions. Antenatal diagnosis and referral to a center with facilities for advanced neonatal cardiac care as well as for interventional neuroradiological therapy can go a long way in improving the prognosis in these children.