Cystic Meningioma.

Meningiomas are most common intracranial extraaxial tumours, but atypical meningeiomas like cystic meningioma are rare. It is about 2 to 4 % in adults and 10 to 19 % in infants. Because of its atypical presentation a case of cystic meningioma is presented.

Meningioma quístico / Cystic meningioma

OBJETIVO: presentar un paciente con un meningioma quístico, hallazgo infrecuente en la práctica neuroquirúrgica. DESCRIPCIÓN: paciente de sexo femenino, de 66 años de edad, con antecedentes de salud, quien fue llevada al cuerpo de guardia por presentar convulsiones. El examen físico resultó negativo. Los hallazgos obtenidos en la tomografía simple y contrastada hicieron pensar en el diagnóstico de tumor cerebral primario, probable astrocitoma de bajo grado vs. hemangioblastoma, que por su localización parietal alta podría justificar el cuadro clínico de la paciente. INTERVENCIÓN: se realizó tratamiento quirúrgico, con posterior examen histopatológico, y se detectó un meningioma angiomatoso. CONCLUSIONES: los meningiomas quísticos constituyen un hallazgo infrecuente en la práctica neuroquirúrgica, no obstante, no se debe olvidar que existen varios signos imagenológicos que orientan al diagnóstico preoperatorio como la existencia del signo de la cola, la irrigación procedente de la carótida externa o la ubicación en sitios de asentamiento frecuente de meningiomas.

OBJECTIVE: the presentation of a patient with cystic meningioma an uncommon finding in the neurosurgical practice. DESCRIPTION: a female patient aged 66 with health history seen in emergency department due to convulsions. The physical examination was negative. The findings obtained in single and contrasted tomography to bring about the diagnosis of primary cerebral tumor, a low grade probable astrocytoma versus hemangioblastoma which due to its parietal location could to justify the clinical picture of the patient. INTERVENTION: surgical treatment with a subsequent histological-pathological examination detecting the presence of an angiomatous meningioma. CONCLUSIONS: the cystic meningiomas are a uncommon finding in the neurosurgical practice, however, we must to take into account the there are some imaging signs leading to the preoperative diagnosis as the presence of tail sign, the irrigation of the external carotid or the location in sites of frequent settlement of meningiomas.

Cystic Meningiomas

Cystic Meningiomas are rare tumor. There is a clear prevalance in infants, according for 10~19% of all intracranial meningiomas in this age group, compared with only 2~4% in adults. But, reports of cystic meningioma have been increased in frequency since the introduction of computed tomography(CT) and magnetic resonance image(MRI). Authors report two cases of cystic meningioma in adults. Radiological finding showed extraaxial mass with cystic component. Authors performed total surgical resection of the tumor mass and of the entire cystic component with cystic wall in both patients. Postoperative histopathological diagnosis of the tumor mass was a transitional meningioma in both patients. Both patients showed favorable prognosis and no recurrence findings in follow up MRI.

Cystic Meningioma Complicated by Delayed Hemorrhage from a Pseudoaneurysm: Case Report

We report a case of delayed rupture of pseudoaneurysm after operation for meningionma. A 68-year-old female presented with mild headache and hemiparesis. Magnetic resonance imaging showed a cystic mass lesion with a solid component, which was attached to dura in the right frontal area. The mass was totally removed, and diagnosed to transitional type meningioma with histopathological examination. Postoperatively, almost of preoperative symptoms were impoved. About a month later, she developed sudden onset deterioration of mental state and hemiparesis. Computed tomography disclosed a large intracerebral hemorrhage at the site of the tumor bed. Emergency operation was performed. During the evacuation of hematoma, we found a ruptured pseudoaneurysm, and secured it with circumferential wrappig and clipping. The patient recovered well and became ambulatory. In case of delayed intracerebral hematoma at the postoperative site, a possibility of the rupture of pseudoaneurysm should be considered.

3 Cases of Cystic Meningioma: Case Report

The authors report unusual three cases of large, peri- or intratumoral cystic lesions associated with intracranial meningiomas. These meningiomas may lead to an incorrect presumptive diagnosis because of minic appearance of a glial or metastatic tumor in computed tomography(CT) or magnetic resornance imaging(MRI) finding. Radiological evaluation and recognition are important for the surgical removal of these potentially curable neoplasms.

Cystic meningiomas in infancy

A suprasellar meningioma with multiple intratumoral cysts in a 6-month-old boy is reported. A review of literature disclosed only 11 cases so far. They showed a characteristic predominance in males and predominance of fibroblastic type on pathological examination. Intratumoral cystes are less common than peritumoral cysts. The various hypothesis regarding cyst formation are discussed.

Cystic Meningioma: A case report

Meningiomas are usually thought of as firm solid tumors and most standard references make no mention of cystic meningiomas. Although several cases of cystic meningioma have been reported in the literature and their neuroradiological features discussed, the rarity of this entity makes its preoperative diagnosis difficult. Recently, the authors encountered a case of cystic meningioma, which was thought as ependymal cyst or infarction, preoperatively. In this report the authors discussed its clinical, neuroradiological and pathological characteristics with brief reviews of the literature.

Clinical Observation of Intracranial Meningiomas(Computerized Tomographic Findings and Pathological Correlation)

Intracranial meningioma is one of the most easily detectable tumor in the preoperative period with the brain computerized tomographic(CT) scan. Although most of them are of benign nature, they present tendency to invade surrounding brain tissue and to recur in spite of complete surgical removal. Authors analysed the clinical features of 27 cases of histologically verified meningiomas and attempted to study the correlation between CT findings and histological types to predict their clinical invasiveness and aggressiveness. Female was predominated in occurance than male in the ratio of 17:10. Mean age of occurance was 40.5-year-old. The most frequent symptoms and signs were headache, papilledema and visual disturbance in order. The most frequent histological type was meningotheliomatous type(55.6%) which was followed by transitional(18.5%), fibroblastic(18.5%) and angioblastic(7.4%) types. In the finding of the brain CT scan, perifocal brain edema was noticed in nearly almost cases and high density of the tumor mass in the precontrast CT scan was predominated in transitional and fibroblastic types. But, marked perifocal brain edema, irregular tumor margin, loss of homogeneity of the tumor density and marked contrast enhancement, which were considered to be more aggressive and invasive findings, were predominated in the meningotheliomatous and angioblastic types. So, these types seemed to be more aggressive and invasive than other types. Large cystic meningiomas were 14.8% in author's cases.