1/37. Clinically aggressive diffuse capillary telangiectasia of the brain stem: a clinical radiologic-pathologic case study.Capillary malformations or telangiectasias of the brain usually exhibit a benign clinical course, although occassionally they may be associated with mild to moderate symptomatology of uncertain origin. We report a case of an exceptionally aggressive capillary telangiectasia in a child, which was associated with progressive neurologic deterioration resulting in death.- - - - - - - - - - ranking = 1keywords = brain (Clic here for more details about this article) |
2/37. Presumed capillary telangiectasia of the pons: MRI and follow-up.Capillary telangiectasia is a vascular abnormality primarily of the brainstem. The clinical relevance is unclear as is the association with clearly pathologic findings such as cavernous haemangioma. We report on four cases with capillary telangiectasia proven by follow-up and describe the imaging characteristics. T2 abnormality was only observed in half of the patients as was the presence of a discernable collecting vein. Whereas two cases were incidental findings in neurologically normal persons and one had symptoms clearly attributable to lacunar stroke, one patient may have had symptoms due to the vascular abnormality in the pons.- - - - - - - - - - ranking = 0.2keywords = brain (Clic here for more details about this article) |
3/37. Correlation between magnetic resonance images and draining patterns in dural arteriovenous fistulas with leptomeningeal venous drainage.OBJECTIVE: To compare abnormal intensity areas on intracranial magnetic resonance images (MRI) and the pattern of venous drainage in dural arteriovenous fistulas (DAVFs) with retrograde venous drainage. methods: Thirteen patients with retrograde venous drainage of DAVFs were divided into two groups based on the venous drainage pattern determined by detailed angiographic and MRI study. In group 1 there was an accessory route draining into another sinus besides the main draining sinus. In group 2 no such accessory route was present. RESULTS: In group 1 patients (n = 8), MRI detected no unusual intensity areas; 5 patients in this group had episodes of bleeding. Angiographically, in this group retrograde venous drainage tended to occur via multiple varices. On the other hand, none of the 5 group 2 patients experienced a bleeding episode. Angiographically, there was a low incidence of varices. On T2-weighted images, these patients had a hyperintensity area. Following treatment, these areas of abnormality disappeared on T2-weighted MRI. CONCLUSION: Among 13 patients with DAVFs which drained retrogradely, those with a variceal accessory route (Group 1, n = 8) had a higher incidence of haemorrhage. In patients without such an accessory route (Group 2, n = 5) abnormal signal intensity on MRI was indicative of venous congestion. Continuous-mode angiography and MRI study were useful in the precise identification of DAVFs with a venous drainage route.- - - - - - - - - - ranking = 66.769809389058keywords = haemorrhage (Clic here for more details about this article) |
4/37. Intracranial dural arteriovenous fistula with spinal medullary venous drainage.We report on a 46-year-old patient in whom an intracranial dural arteriovenous (AV) fistula, supplied by a branch of the ascending pharyngeal artery, drained into spinal veins and produced rapidly progressive symptoms of myelopathy and brainstem dysfunction including respiratory insufficiency. magnetic resonance imaging studies demonstrated brainstem oedema and dilated veins of the brainstem and spinal cord. Endovascular embolization of the fistula led to good neurological recovery, although the patient had been paraplegic for 24 h prior to embolization. This case demonstrates the MRI characteristics of an intracranial dural AV fistula with spinal drainage and illustrates the importance of early diagnosis and treatment. Even paraplegia may be reversible, if angiography is performed and the fistula treated before ischaemic and gliotic changes become irreversible.- - - - - - - - - - ranking = 0.6keywords = brain (Clic here for more details about this article) |
5/37. classification of venous ischaemia with MRI.PURPOSE: Venous ischaemia is diagnosed by angiography and estimated with SPECT and PET. But venous ischaemia presents different features due to aetiology, type of onset, time course and collateral circulation. The purpose of this study was to analyse and to classify VI with MRI. methods: An analysis of 12 cases of dural arteriovenous fistula (DAVF) with venous ischaemia, 4 cases of sinus thrombosis, and a case of cortical venous thrombosis was performed. Venous ischaemia is classified with MRI as Type 1: no abnormality, Type 2: T2WI showed high signal intensity area and Gd-MRI showed no enhancement, Type 3: T2WI showed high signal intensity area and Gd-MRI showed enhancement, Type 4: venous infarction or haemorrhage. RESULTS: Type 1 was 8 cases. Type 2 was 3 cases and indicated cytotoxic oedema. Type 3 was 2 cases and indicated vasogenic oedema because of the destruction of blood brain barrier. Type 4 was 4 cases. CONCLUSIONS: The classification may be a useful indicator of severity of venous ischaemia and treatment.- - - - - - - - - - ranking = 66.969809389058keywords = haemorrhage, brain (Clic here for more details about this article) |
6/37. Spinal arteriovenous malformations: a review with case illustrations.Spinal arteriovenous malformations are united by the existence of arteriovenous shunting but are quite heterogeneous in terms of pathology. Until recently, the pathological confusion has been such that management has been poorly understood and this is magnified by the rarity of the lesions. Type 1 AVMs, where the fistula is located in the dura, usually present with a venous hypertensive myelopathy and are relatively easily dealt with surgically. Type 2 AVMs, most closely mimicking the parenchymal AVMs of the brain, usually present with haemorrhage and may be surgically remediable but with much greater risk than the type 1 lesions. Type 3 AVMs, with a diffuse location through both the cord and extra-CNS tissue, usually present early in life with a myelopathy and are often untreatable. Type 4 AVMs, with a fistula located on the pial surface of the cord, usually present with a venous hypertensive myelopathy or subarachnoid haemorrhage, can be treated relatively easily by surgery when small but may be better treated endovascularly when the fistula is large.The purpose of this review is to summarise the current pathological, clinical and management literature with illustrative cases underscoring the important features of this heterogeneous disorder.- - - - - - - - - - ranking = 133.73961877812keywords = haemorrhage, brain (Clic here for more details about this article) |
7/37. Symptomatic unruptured capillary telangiectasia of the brain stem: report of three cases and review of the literature.Three young patients with transient or intermittent focal neurological signs suggesting brain stem involvement are described, in whom high field MRI showed focal areas of hyperintensity in T2 weighted spin echo images, hypointensity in T2* weighted gradient echo images, and enhancement in postcontrast T1 weighted images consistent with unruptured capillary telangiectasia of the brain stem. The first patient was a 28 year old woman who complained of recurrent left ear tinnitus, exacerbated during the menstrual period; MRI demonstrated that the vascular anomaly involved the left acoustic pathway. The second patient was a 30 year old woman who had three episodes of paroxysmal left lip movement 4 weeks after child delivery; MRI showed capillary telangiectasia in the right corticonuclear pathway. The third patient, a 36 year old man, had a transient right Bell's palsy; MRI disclosed two circumscribed areas consistent with capillary telangiectasia in the left corticospinal tract and medial longitudinal fasciculus. Steroid receptors in the telangiectatic vessels walls might account for the recurrent and transient course seen in our two female patients. awareness of the MRI features of capillary telangiectasia may help in defining the real incidence, clinical correlation, and the risk of haemorrhagic complications of these vascular malformations.- - - - - - - - - - ranking = 1.2keywords = brain (Clic here for more details about this article) |
8/37. Successful transarterial glue embolisation by wedged technique for a tentorial dural arteriovenous fistula presenting with a conjunctival injection.Many tentorial dural arteriovenous fistulae (TDAVF) present with intracranial haemorrhage. We report a patient who presented with conjunctival injection. Transarterial embolisation of the TDAVF was undertaken with a wedged injection of a low concentration of N-butyl cyanoacrylate, arresting the flow next to the proximal segment of the venous outlet. After three sessions, a complete cure was achieved. We present a useful method which has not been reported previously.- - - - - - - - - - ranking = 137.80677301423keywords = intracranial haemorrhage, haemorrhage (Clic here for more details about this article) |
9/37. MR imaging and histologic features of capillary telangiectasia of the basal ganglia.Capillary telangiectasias are being recognized with increasing frequency on MR imaging studies. Most are located in the brain stem and show slightly increased signal intensity on T2-weighted images, low signal intensity on T2*-weighted images (reflecting the presence of deoxyhemoglobin), and contrast enhancement. These findings are considered fairly typical for capillary telangiectasia, and pathologic correlation is not generally pursued. We present a case of a proven capillary telangiectasia in the basal ganglia. The imaging features of the lesion were identical to those described for capillary telangiectasias in the brain stem.- - - - - - - - - - ranking = 0.4keywords = brain (Clic here for more details about this article) |
10/37. Partial labyrinthectomy approach for brainstem vascular lesions.Conventional wisdom has typically dictated that the bony labyrinth is an inviolate structure. This notion, however, was successfully challenged following the introduction of the partial labyrinthectomy approach, which was primarily used for the surgical management of cerebellopontine and petrous apex meningiomas. In this article, we discuss an extension of the technique of partial labyrinthectomy in a series of patients that has been used for the treatment of brainstem vascular lesions. We believe that this technique provides superior exposure to the brain stem when compared with conventional retrosigmoid and retrolabyrinthine approaches while reducing the inherent morbidity seen in transotic or petrosectomy approaches.- - - - - - - - - - ranking = 1.2keywords = brain (Clic here for more details about this article) |
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