Intraventricular Meningiomas

Abstract

Intraventricular meningiomas are rare tumors, comprising only 0.5% to 5% of all intracranial meningiomas. In this article, 8 cases of histopathologically proven intraventricular meningioma that were treated at the Ç ukurova University Neurosurgery Department are discussed. The radiologic, histologic, and clinical findings of intraventricular meningiomas and the surgical approach to lateral intraventricular meningiomas were reviewed retrospectively. Our 8 patients ranged in age from 18 to 65 years (mean = 44.6 years). Two patients were male and 6 were female, for a 1:3 male-to-female ratio. Computed tomography and magnetic resonance imaging demonstrated the 7 tumors within the lateral ventricle and only 1 tumor within the third ventricle. All lateral ventricular tumors were located in the region of the trigone. Headache and hemiparesis were the most common presenting symptoms. Histologic studies revealed meningotheliomatous meningiomas in 5 patients, transitional meningioma in 2 patients, and anaplastic (malignant) meningioma in 1 patient. The superior parieto-occipital approach in 5 patients, posterior middle temporal gyrus approach in 2 patients, and posterior transcallosal approach in 1 patient were used for surgical therapy, and total resection was achieved in all patients. The overall neurologic outcome at follow-up (mean follow-up = 12 months, range: 1 month to 5 years) was excellent (no deficit) in 4 patients, good (some deficit but independent) in 2 patients, and poor (dependent) in 1 patient. One patient died after surgery. We conclude that intraventricular meningiomas are curable by complete surgical resection. This is possible with little neurologic morbidity when the neurosurgeon understands the surgical approaches available and the indications for those approaches.

Microsurgical Management of a Rare Incidental Intraventricular Meningioma: a Case Report and Relevant Literature Review

“…Since such tumors arise from the arachnoid cap cells within the choroid plexus, they are relatively more common in the lateral in comparison to the third or fourth ventricles 27 . Hence, the majority of them originate from the trigone area, while the left lateral ventricle is more commonly described as a predominant site 1,6,7,28 . Nonetheless, our patient's tumor was located in the occipital horn of the right lateral ventricle, which made it even scarcer.…”

“…Meningiomas are mostly benign intracranial tumors arising from the arachnoid cap cells, and the second most common primary tumors of the central neu-ral system in adults. They may be found in any intracranial location including brain convexity, and the skull base [1][2][3][4][5] . Still, intraventricular meningiomas (IVMs) are rare lesions with an incidence of approximately 0.5%-3% of all intracranial meningiomas [6][7][8][9][10][11][12][13] .…”

Intraventricular tumors - silent or noisy cerebral pathology?

“…Intraventricular tumors are usually derived from the ependyma or choroid plexus cells, only rarely being neuronal, or metastatic [11][12][13]. The most often identified intraventricular neoplasms are central neurocytomas, unique to the ventriculary system, located usually in the anterior portion of the lateral ventricle near the foramen of Monro, ependymomas and subependymomas, that are usually found in the fourth or lateral ventricles, choroid plexus carcinomas and papillomas, both highly vascularized and with a high potential to cause hydrocephalys, colloid cysts [14], meningiomas, and so on [3,6,9,15,16].…”

Imaging of supratentorial intraventricular masses in children:a pictorial review— part 1

“…Meningiomas (WHO grades 1 to 3) are rare in children and are even less likely to occur in the ventricles [ 47 ]. While meningiomas can appear anywhere within the ventricular system [ 48 ], they are more commonly found in the atrium of the lateral ventricles [ 48 , 49 ]. These tumours arise from arachnoid cells trapped within the CP [ 18 ] and exhibit no histological difference from the supratentorial meningiomas [ 50 ].…”