1/383. 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 (Clic here for more details about this article) |
2/383. Multiple skull base meningioma: case report.BACKGROUND: The incidence of multiple skull base meningiomas varies from 1 to 3% in different series. skull base meningiomas are rare. The pathogenetic role of low-dose radiation seems to be fairly well established in the oncogenesis of meningiomas. Calvarial location and multiplicity seem to be among the distinctive features of radiation-induced meningiomas. skull base location is a very rare occurrence, mainly because the path of irradiation does not significantly involve this region. CASE REPORT: We describe a rare case of simultaneous occurrence of two skull base meningiomas in a 66-year-old female. This patient underwent low-dose irradiation for tinea capitis when she was 8 years old. The patient complained of nuchal pain, paresthesias in both hands, and progressive weakness on her right side. She was admitted to the hospital in September 1994. An MRI showed two masses, one located at the level of the tuberculum sellae and the other at the foramen magnum. These seemed very likely to be multiple meningiomas. The latter lesion, which was more symptomatic and dangerous, was operated on first. Six months later, elective treatment of the suprasellar meningioma was performed with success. CONCLUSION: The actual role of previous head irradiation in the oncogenesis of the present meningiomas remains somewhat unclear. Proper management and judicious use of skull base surgery techniques were key factors in the successful treatment of the patient.- - - - - - - - - - ranking = 0.81286201541332keywords = suprasellar (Clic here for more details about this article) |
3/383. Foreign body granuloma mimicking intracranial meningioma: case report and review of the literature.OBJECTIVE AND IMPORTANCE: Intracranial foreign body granulomas are rare. We describe a case of an intracranial foreign body granuloma found in a 17-year-old female patient 9 years after she underwent a craniotomy for a tumor of unknown type. Postoperative imaging of patients who have undergone neurosurgical procedures can often reveal enhancing masses, and foreign body granuloma should be included in the differential diagnosis. CLINICAL PRESENTATION: The patient presented with a history of developmental delay, panhypopituitarism, and chronic headache. Admission resulted from an acute increase in the severity of her headache. INTERVENTION: Imaging studies, including computed tomography and magnetic resonance imaging, demonstrated a 1.5 x 2 cm round, enhancing anterior interhemispheric mass, appearing to arise from the falx and causing mild mass effect. A nonenhancing cystic mass was also noted in the suprasellar region but was without mass effect. The patient underwent a craniotomy and removal of the anterior mass without complication, and her headache resolved. A pathological examination of the specimen confirmed the diagnosis of foreign body granuloma. CONCLUSION: Although rare, foreign body granuloma should be included in the differential diagnosis of previously operated intracranial masses. The importance of accurate historical information and guidelines that may assist in diagnosis are discussed.- - - - - - - - - - ranking = 0.87674480098035keywords = suprasellar, cyst (Clic here for more details about this article) |
4/383. Dorsum sellae meningioma mimicking pituitary macroadenoma: case report.BACKGROUND: A dorsum sellae meningioma is a rare occurrence. It is difficult to evaluate dorsum sellae meningiomas preoperatively from the viewpoint of neuroimaging. We report a rare case of dorsum sellae meningioma mimicking pituitary macroadenoma in a 73-year-old woman. CASE PRESENTATION: The patient presented with bitemporal hemianopsia and panhypopituitarism. Magnetic resonance imaging demonstrated a bright, homogeneously enhancing intra- and suprasellar mass and a hypointense region in this mass, which was interpreted as a dorsum sellae. Transsphenoidal extirpation was used because of a suspicion of nonsecreting pituitary macroadenoma. Histopathologically, the tumor was diagnosed as a meningioma. Superselective external carotid angiography before the second surgery revealed that the mass was supplied by the left accessory middle meningeal artery and appeared to originate from dorsum sellae. After preoperative embolization, the patient developed hyponatremia. The tumor was subtotally removed via a transcranial route, and the attachment to the dorsum sellae was coagulated extensively. She did well after a second surgical procedure. CONCLUSION: These radiologic findings may be useful in differentiating dorsum sellae meningioma from pituitary macroadenoma.- - - - - - - - - - ranking = 0.81286201541332keywords = suprasellar (Clic here for more details about this article) |
5/383. 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 = 4.3463066342386keywords = central nervous system, nervous system (Clic here for more details about this article) |
6/383. 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 = 4.3463066342386keywords = central nervous system, nervous system (Clic here for more details about this article) |
7/383. 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 = 4.3463066342386keywords = central nervous system, nervous system (Clic here for more details about this article) |
8/383. 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 = 4.3463066342386keywords = central nervous system, nervous system (Clic here for more details about this article) |
9/383. 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 = 4.3463066342386keywords = central nervous system, nervous system (Clic here for more details about this article) |
10/383. Intracerebral cystic meningioma--case report.A 46-year-old female presented with persistent bifrontal headache. Computed tomography revealed a large cystic tumor in the right temporoparietal area, which included a solid component. The tumor had no attachment to the dura. There was no peritumoral edema or mass effect usually found around cystic meningiomas. The solid component was totally removed. Histological examination indicated that the tumor was a fibrous meningioma. Intracerebral meningioma with a large cystic component without dural attachment should be considered in the differential diagnosis of cystic cerebral tumors.- - - - - - - - - - ranking = 0.51106228453622keywords = cyst (Clic here for more details about this article) |
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