Browsing by Author "Krishnamoorthy, T"

Now showing 1 - 20 of 20
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    3D-CISS MRI in a purely intracanalicular cochlear schwannoma
    (JOURNAL OF NEURORADIOLOGY, 2008) Thomas, B; Krishnamoorthy, T; Arvinda, HR; Kesavadas, C
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    An incidental persistent falcine sinus with dominant straight sinus and hypoplastic distal superior sagittal sinus
    (PEDIATRIC RADIOLOGY, 2006) Manoj, KS; Krishnamoorthy, T; Thomas, B; Kapilamoorthy, TR
    An incidental persistent falcine sinus was detected in an otherwise normal brain on MRI in a 12-year-old girl who underwent imaging after clinical suspicion of acute disseminated encephalomyelitis. The falcine sinus was associated with a hypoplastic posterior third of the superior sagittal sinus and a dominant straight sinus. Generally, atresia or hypoplasia of the straight sinus is associated with a persistent falcine sinus in postnatal life; otherwise, the falcine sinus disappears before birth. We discuss the embryological basis for such an association in this case.
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    Carotid artery stenting: Results and long-term follow-up
    (NEUROLOGY INDIA, 2006)
    Background and Purpose: The role of carotid artery stenting (CAS) as an alternative to carotid endarterectomy in the treatment of for symptomatic carotid artery stenosis is investigated. Materials and Methods: Forty-seven patients underwent CAS over 10-year period. Forty-nine vessels were treated. Stenosis quantification was done using North American symptomatic carotid endarterectomy trial method. The mean follow-up period by clinical and Duplex examination ranged is 5.6 years. Results: The technical success rate was 100%. There were four deaths (8.1%) and two (4.1%) minor strokes within thirty days of procedure. There was no major strokes. All patients with minor stroke achieved complete recovery at 1-month follow up. Two deaths occurred probably due to hyperperfusion syndrome (HS) and two due to cardiac arrest. Conclusion: CAS is an effective treatment modality of symptomatic carotid artery disease but should be carefully done in high-risk groups having severe medical ailments and those having severe bilateral stenosis of the carotid arteries.
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    Embolization of craniofacial vascular malformations
    (RIVISTA DI NEURORADIOLOGIA, 2005) Bodhey, NK; Gupta, AK; Purkayastha, S; Kesavadas, C; Krishnamoorthy, T; Kapilamoorthy, T; Thomas, B
    Craniofacial vascular malformation (CVM) is a major cosmetic concern and may present as catastrophic situations like bleeding apart from the functional impairment. The treatment of CVM has been very challenging. Till the recent past, surgery was the mainstay of treatment. However, because of the torrential intraoperative haemorrhage and frequent recurrences, embolization has evolved as a major adjunct in treating these lesions. This study evaluated the efficacy of various preoperative embolization techniques in the management of CVM. A total of 94 patients (54 males, 40 females) with an age range from three months to 68 years with a mean of 42.4 years having craniofacial AVM (forehead, face, neck and scalp lesions) were treated with the various embolization techniques: Arterial route with (a) hydrogel only (b) hydrogel and gelfoam (c) gel foam only (d) nbutyl cyanoacrylate (NBCA), Venous route and direct puncture injection of NBCA. The devascularisation achieved with the transarterial route was between 80-95% with particulate agents and 95-100% with NBCA. Direct puncture embolization also resulted in near total devascularisation of the lesion. This resulted in a significant decrease in blood loss at surgery. Cure was obtained in a few patients without the need for surgery. After embolization, almost all the patients had mild pain and subtle increase in the swelling with firmer consistency. The embolization of CVM is an essential adjunct to surgery in most cases and can be curative in a few patients. Hydrogel, PVA and gelfoam are good embolizing agents with NBCA being excellent when used with direct puncture.
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    Endovascular treatment of carotido-cavernous fistula
    (RIVISTA DI NEURORADIOLOGIA, 2003) Gupta, AK; Rao, VRK; Kapilamoorthy, TR; Bhattacharya, RN; Joseph, S; Krishnamoorthy, T
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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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    Extensive brain and muscular cysticercosis
    (NEUROLOGY, 2006)
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    Hyperperfusion syndrome after supraaortic vessel interventions and bypass surgery
    (JOURNAL OF NEURORADIOLOGY, 2005)
    Cerebral hyperperfusion and hemorrhage is a recognized complication of endarterectomy, aortocarotid bypass surgery or angioplasty and stenting of the carotid or vertebral artery. We performed 87 balloon angioplasty, stenting and bypass surgery of arteries supplying the brain over the last 15 years. We have found 6 cases of hyperperfusion syndrome in a total of 87 procedures. So the incidence of hyperperfusion was noted as 6.89%. Two cases occurred after two combined procedures in a single sitting. Hyperperfusion syndrome is a well-known complication of craniocervical revascularisation procedures. gut with proper care, including strict post procedural control of blood pressure and staged procedure in case of multiples vessel stenosis, these complications can be largely avoided.
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    Intracranial aneurysmal bone cyst manifesting as a cerebellar mass
    (NEUROLOGY INDIA, 2003)
    A 17-year-old boy presented with symptoms of raised intracranial pressure for a month. Investigations revealed a large extra-cerebellar mass. The lesion was radically resected. It arose from the petrous bone. Histology revealed the lesion was an aneurysmal bone cyst [ABC].
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    Isolated left vein of Labbe thrombosis
    (NEUROLOGY, 2005)
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    Leukoaraiosis. A short review
    (RIVISTA DI NEURORADIOLOGIA, 2005) Kapilamoorthy, TR; Fiorelli, M; Gupta, AK; Kesavadas, C; Krishnamoorthy, T; Bozzao, L
    Leukoaraiosis (LA) is the widely accepted definition for the changes in the white matter of the brain frequently detected in the elderly by neuroimaging techniques. LA has a vascular pathogenesis and is a definite contributory factor for stroke, cognitive decline and dementia. Theoretically, though not yet in practice, if these lesions are detected at an early stage treatment can be instituted promptly, thereby preventing a catastrophic event later. Here we concisely review the relevant literature and stress the imaging of LA and its clinical significance.
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    Percutaneous retrieval of intravascular broken catheter fragments. A novel technique using a balloon
    (INTERVENTIONAL NEURORADIOLOGY, 2005)
    We describe a novel technique to retrieve broken catheter fragments from the vascular tree at difficult locations using a balloon. A coronary balloon can be taken over a microwire into the catheter fragment to hold it after inflation of the balloon and then the whole assembly can be gradually taken out. We used this novel technique successfully in three patients where the snare failed to retrieve the broken catheter fragment from vascular tree.
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    Pyogenic cerebral abscess with discharging sinus complicating an embolized arteriovenous malformation
    (JOURNAL OF NEURORADIOLOGY, 2006)
    Brain arteriovenous malformations (AVM) are treated with endovascular embolization either as a definitive treatment or as an adjunct to surgery or stereotactic radiotherapy. Complications of AVM embolization are well known but infection of the embolised AVM nidus is extremely rare. On Pubmed search we found only a single case report of an infected brain AVM after embolization. We report a case of pyogenic cerebral abscess with superior sagittal sinus extension complicating an embolised AVM and discuss the possible etiopathogenesis.
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    Rhabdoid tumor of the thalamus
    (NEUROLOGY INDIA, 2003)
    Rhabdoid tumors of the central nervous system are uncommon tumors. About 188 cases have been reported in the literature so far. In this report, we describe a case of a rhabdoid tumor of the thalamus in a 35-year-old male patient. Light microscopic and immunohistochemical features are discussed and the relevant literature reviewed.
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    Spinal arteriovenous malformations - Role of interventional neuroradiology
    (RIVISTA DI NEURORADIOLOGIA, 2003) Gupta, AK; Rao, VRK; Bhattacharya, RN; Joseph, S; Kapilamoorthy, TR; Krishnamoorthy, T
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    Takayasu arteritis with multiple intracranial aneurysms - A case report
    (INTERVENTIONAL NEURORADIOLOGY, 2004) Sonwalkar, HA; Gupta, AK; Purkayastha, S; Bodhey, NK; Krishnamoorthy, T
    A rare case of multiple cerebral aneurysms associated with Takayasu aortitis is reported. Only seven cases have been reported so far, all Of which are front Japan. This is the first case with this association being reported from India. A 50-year-old hypertensive woman developed sudden onset severe headache and loss of consciousness. CT scan revealed subarachnoid haemorrhage in the suprasellar cisterns and mild hydrocephalus. The patient on admission had a rebleed producing a massive subarachnoid haemorrhage. Angiogram revealed occlusion of bilateral vertebral arteries and right common carotid artery The left carotid artery was ectatic with saccular aneurysms in the ophthalmic segment and communicating segment. Aortogram showed the radiological picture of Takayasu arteritis Type III. Surgical clipping of the aneurysms was performed. However, the patient developed a massive right cerebral infarct in the postoperative period following which she expired. Abnormal haemodynamics in the overloaded cerebral circulation rather than primary arteritic involvement of intracranial vessels appears to be the cause of aneurysm formation.
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    Unknown case
    (SPINE, 2006)