Dipanka Sarma

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Transdural herniation of the spinal cord, a rare but well-documented entity, has been reported sporadically for more than 25 years as a possible cause for various neurological signs and symptoms ranging from isolated sensory or motor findings to myelopathy and Brown-Séquard syndrome. The authors report, to the best of their knowledge, the first case of(More)
Dural arteriovenous shunts are abnormal arteriovenous communications within the dura. They are thought to be an acquired condition in adults and can present with a variety of clinical features, ranging from benign bruits to intracranial hemorrhage and neurological deficits. The presentation and natural history of these shunts is largely determined by the(More)
To evaluate the yield of digital subtraction angiography (DSA) and repeated follow-up imaging in patients with initial pattern of perimesencephalic subarachnoid hemorrhage (PSAH) and negative computed tomography angiography (CTA) in excluding an underlying aneurysm. We conducted a retrospective analysis of all nontraumatic SAH who underwent a DSA between(More)
We report a patient with extensive cerebral venous thrombosis who showed complete reversal of restricted diffusion on MRI, accompanied by excellent clinical recovery. The implications of these findings in relation to interpretation of diffusion changes in cerebral venous thrombosis are discussed, and differences with arterial stroke are highlighted.
Transfemoral approach for endovascular interventions is not always possible in cases of unfavorable anatomy. We report our experience using a transcervical approach with carotid cut down and direct, controlled puncture of the carotid artery. Four patients underwent surgical exposure of the carotid artery for endovascular procedures. One patient had(More)
Brain edema in unruptured brain arteriovenous malformations (AVMs) is rare; this study examines (1) its frequency and clinical presentation, (2) imaging findings with emphasis on venous drainage abnormalities, and (3) implications of these findings on natural history and management. Presentation and imaging features of all unruptured brain AVMs were(More)
Thromboembolic stroke from migration of thrombus formed in non-giant intracranial aneurysms is a recognized but rare event. We describe a case of partial thrombosis of a 7 mm anterior communicating artery aneurysm, which embolized to the right callosomarginal artery in the brief time interval between two sequential diagnostic angiograms performed as part of(More)