1/516. foramen magnum meningioma presenting as amyotrophic lateral sclerosis.amyotrophic lateral sclerosis (ALS) is a progressive, degenerative disease of the nervous system. It affects adults in all age groups and leads to death few years after the diagnosis. The etiology is unknown, and there no convincing medical or surgical therapy Some diseases can mimic ALS. If diagnosed early these may be treatable, but if misdiagnosed as ALS and left untreated they may be fatal. We present a case of foramen magnum meningioma presenting clinically as ALS. After surgery, the symptoms disappeared and the neurological deficits improved.- - - - - - - - - - ranking = 1keywords = nervous system, neurologic, lead (Clic here for more details about this article) |
2/516. hemangioblastoma mimicking tentorial meningioma: preoperative embolization of the meningeal arterial blood supply--case report.A 72-year-old male presented with a primary hemangioblastoma of the posterior fossa with unusual dural attachment and meningeal arterial blood supply from the external carotid artery and marginal tentorial artery. Preoperative embolization facilitated complete resection of the tumor with no resultant neurological deficit. hemangioblastoma must be included in the differential diagnosis of tumors with dural involvement. Preoperative embolization is very useful in such tumors.- - - - - - - - - - ranking = 0.047495650781584keywords = neurologic (Clic here for more details about this article) |
3/516. Primary meningeal fibrosarcoma: a particular neuroradiological presentation.Primary meningeal fibrosarcoma is a rare malignant tumor of the central nervous system. About seventeen cases have been reported in the literature since 1980. We present the case of a patient whose initial neuroradiological manifestation of primary meningeal fibrosarcoma was an en plaque meningioma. Fifteen months later, he developed a dramatic clinical deterioration and coma. CT scan revealed a large frontal lesion. The mass was completely removed and histological examination was characteristic of meningeal fibrosarcoma.- - - - - - - - - - ranking = 0.95175456290212keywords = nervous system (Clic here for more details about this article) |
4/516. Solitary fibrous tumor of the meninges: two new cases and review of the literature.BACKGROUND: Solitary fibrous tumor (SFT), a mesenchymal neoplasm originally described in the pleura has been more recently reported to arise in a number of other sites, including the meninges. Nowadays immunohistochemistry facilitates the otherwise problematic differential diagnosis with regard to other benign and malignant spindle cell neoplasms of the central nervous system. methods: Two recently treated cases of meningeal SFT (one craniospinal, one spinal) are presented and discussed in the light of the present knowledge and a review of the literature. RESULTS: Total resection was followed by complete recovery and both patients are presently asymptomatic and without evidence of disease. The microscopic and immunohistochemical profiles (CD 34, vimentin positive; S-100, EMA negative) were consistent with those of previously reported cases. CONCLUSIONS: The majority of SFTs behave in a benign fashion and do not recur unless subtotally resected. Malignant variants may account for up to 37% of SFTs in other locations but have never been reported to occur in the meninges. Meningeal SFTs are to be considered a new pathological entity. Wider use of immunohistochemical screening should enable the determination of their real incidence; larger series and longer follow-up will provide conclusions about their treatment and prognosis.- - - - - - - - - - ranking = 0.95175456290212keywords = nervous system (Clic here for more details about this article) |
5/516. herpes simplex encephalitis after brain surgery: case report and review of the literature.Intracranial infection after neurosurgical intervention most often is caused by bacteria. A rare case of fatal herpes simplex encephalitis after removal of a meningioma is described and similar cases reported in the literature are reviewed. Recent diagnostic tools, including detection of herpes viral dna sequences by polymerase chain reaction, complement clinical suspicion and facilitate mandatory early diagnosis, because herpes encephalitis, without rapid initiation of treatment, may lead to severe disability or death.- - - - - - - - - - ranking = 0.00074978631629871keywords = lead (Clic here for more details about this article) |
6/516. Primary brain myxoma, an unusual tumor of meningeal origin: case report.OBJECTIVE AND IMPORTANCE: Primary myxoma of the central nervous system is an extremely rare tumor arising from cells of primitive mesenchymal origin. Only two cases of primary intracranial myxoma have been described previously. We report a patient with a primary myxoma originating from the right frontoparietal convexity dura, which we studied in detail with diagnostic imaging and pathological analysis. CLINICAL PRESENTATION: A female adolescent presented to the emergency department with a 3-day history of mild headache, abdominal pain, and intermittent left-sided focal motor seizures. Neurological examination was remarkable for left leg hyperreflexia and difficulty with tandem gait. Cranial computed tomography and magnetic resonance imaging demonstrated an inhomogeneously enhancing mass in the right frontoparietal region. INTERVENTION: A right frontoparietal craniotomy was performed. During surgery, a tumor appearing similar to a typical convexity meningioma was completely removed along with the dural attachment. CONCLUSION: The patient had an uneventful recovery and returned to normal activity. Primary intracranial myxoma should be distinguished from other meningeal tumors and metastatic cardiac myxoma by appropriate pathological analysis and cardiac evaluation. A circumscribed myxoma completely excised with adequate dural margin carries a good prognosis for surgical cure.- - - - - - - - - - ranking = 0.95175456290212keywords = nervous system (Clic here for more details about this article) |
7/516. Case of the month: March 1999--A 26 year old hiv positive male with dura based masses.A 26-year-old male with AIDS presented with a chief complaint of headaches and neck pain. An MRI revealed two enhancing extra-axial dura based masses, one in the area of the left sphenoid wing and one at the level of C2-3. In both cases, microscopic sections showed actin positive spindle cell neoplasms with long slender nuclei, consistent with leiomyomas. Both tumors were positive for Epstein Barr virus by in situ hybridization. This case report serves to emphasize the importance of considering soft tissue tumors such as leiomyoma in the differential diagnosis of mass lesions that occur in the central nervous system in AIDS and discusses the role of EBV in tumorigenesis.- - - - - - - - - - ranking = 0.95175456290212keywords = nervous system (Clic here for more details about this article) |
8/516. Acute subdural hematoma and pachymeningitis carcinomatosa: case report.Subdural hematomas may affect 0.4-5 p. 100 of patients with cancer, because of predisposing risk factors or because of the cancer itself. The most likely association is with hematological cancer with coagulative disorders. An association with pachymeningitis carcinomatosa is less likely. In this instance the subdural hematoma is due to a neoplastic obstruction of dural vein with subdural engorgement and hemorrhage or subdural effusion. We report a case in which an acute neurological deterioration due to a subdural hematoma disclosed a dural metastasis from a breast cancer operated four years earlier and present a literature review.- - - - - - - - - - ranking = 0.047495650781584keywords = neurologic (Clic here for more details about this article) |
9/516. Rosai-Dorfman disease presenting multiple intracranial lesions with unique findings on magnetic resonance imaging. Case report.Rosai-Dorfman disease (RDD) is a rare idiopathic histoproliferative disease affecting the systemic lymph nodes. Although an extranodal lesion has also been recognized, central nervous system involvement is extremely rare. To the authors' knowledge, only 20 cases of intracranial lesions have been reported previously. Intracranial RDD is clinically and radiologically difficult to distinguish from meningioma, and histological examination is essential for a definitive diagnosis. The authors treated a large frontal lobe tumor associated with multiple meningeal nodules in a 67-year-old patient presenting with diplopia and headache. Radiological examination indicated that the mass was an inflammatory lesion rather than a meningioma. Microscopically the lesion consisted of mixed inflammatory infiltrate with marked emperipolesis, which is characteristic of RDD. A review of the literature and a discussion of the differential diagnosis of this rare lesion are also presented.- - - - - - - - - - ranking = 0.95175456290212keywords = nervous system (Clic here for more details about this article) |
10/516. Falx meningioma presenting as acute subdural hematoma: case report.BACKGROUND: Acute subdural hematomas caused by meningiomas have been rarely encountered. Pathophysiologic mechanisms and clinical considerations in these patients have not been sufficiently explored. We addressed the possible mechanism of spontaneous hemorrhage in our case and briefly discuss the optimal treatment. CASE DESCRIPTION: This case of falx meningioma presenting as an acute subdural hematoma in a 78-year-old woman is described. On initial computed tomography (CT), an enhancing tumor of the falx appeared to be the cause of hemorrhage. Only faint contrast staining in the periphery of the tumor was seen on right external carotid arteriograms, with no evidence of other vascular supply. Extravasation of contrast material during the procedure occurred suddenly and was successfully treated by endovascular embolization using a microcatheter. The hematoma was emergently evacuated with gross total removal of the tumor. Pathologic examination confirmed a transitional meningioma with abundant hyalinized structures. Disruption of a thin-walled vessel adjacent to the tumor capsule was assumed to be the site of hemorrhage. CONCLUSIONS: The longstanding ischemia of the tumor was considered to have produced the deposition of hyalin in the tissue, which changed the hemodynamics within the tumor, producing vascular stress leading to rupture. The prognosis of patients with meningiomas complicated by acute subdural hematoma is generally poor, with mortality reported in approximately one-half of such patients. Surgical exploration is the most effective treatment and should be conducted before irreversible brain damage has occurred.- - - - - - - - - - ranking = 0.00074978631629871keywords = lead (Clic here for more details about this article) |
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