Intraventricular meningiomas: a consecutive series of 22 patients and literature review

Abstract

Objective:Intraventricular meningiomas (IVMs) are rare tumors of which the majority is located in the lateral ventricles. Most published series on the subject include only a few patients. We analyzed our series of IVMs with a special interest in clinical features, outcome and complications related to surgery. Material & Methods:22 patients underwent resection of IVMs from 1990 to 2010 at Oslo University Hospital. Surgical and medical records were retrospectively analyzed. Results:The IVMs were located in the trigonum of the lateral ventricles ( Conclusions:Symptomatic IVMs should be resected, and most symptoms and signs resolve after surgery. The main challenge is to avoid damaging the geniculucalcarine tract when resecting IVMs in the trigonum. Preoperative diffusion tensor imaging-based tractography to map the geniculocalcarine tract should therefore be mandatory before selecting the surgical approach.

Functional Neuronavigation-Guided Transparieto-Occipital Cortical Resection of Meningiomas in Trigone of Lateral Ventricle

“…22,23 We adopted transparieto-occipital cortical approach in our study. This approach is characterized by: First, a small brain tissue damage, although the distance is far more M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT than the lateral approach, but the inferior, posterior and triangle ventricle parallel with the perspective of the operative field with no blind zone.…”

“…However, surgical removal of these lesions remains a considerable challenge because of their deep location adjacent to critical brain structures, necessitating some type of cortical incision and white fibre dissection to reach the tumor. 3 Although there are several ways to access the lateral ventricular system, selection of the optimal approach is usually based on the experience of the neurosurgeons [4][5][6] ,which can vary considerably and may lack a sound scientific basis. Moreover, due to the mass effect of the lesion, cortical structures or white matter may be unrecognizable or deviate from the normal anatomical position, especially for slow-growing lesions that cause remodeling of brain structures over a long period of time.…”

Trigone ventricular meningiomas — clinical characteristics, histopathology and results of surgical treatment

“…In our series, no significant female predominance was observed (53% vs 47%). The mean age reported in the literature varies from 35 to 47 years [9,16]; in our study, the mean age was 52 years.…”

Intraventricular lymphoplasmacyte-rich meningioma: a case report

“…None have been intraventricular in origin. Indeed, intraventricular meningiomas are extremely rare compared to those of other locations, accounting for only 0.5-3% of all meningiomas (22). Most intraventricular tumors arise in the lateral ventricle and over 90% occur in the trigone (3,17).…”