Radiographic diagnosis of meningioma of the lateral ventricle

Abstract

Review of 22 cases of meningioma indicates that this lesion occurs slightly more frequently on the left but without predilection for sex or age of the patient. The presenting symptoms were nonspecific. Plain radiographs of the skull sometimes demonstrated calcification in the tumor, but more often did not. Cerebral angiography frequently showed enlargement and displacement of the anterior choroidal artery on the side of the tumor; the lateral posterior choroidal artery on the side of the tumor was also enlarged and displaced in seven of nine patients who underwent vertebral arteriography. Pneumoencephalography accurately demonstrated the site and size of the lesion, as did radionuclide scanning if the lesion was vascular. Computerized tomographic (TC) scanning also determined the location and size of the tumors, as well as their mass effect and vascularity; CT scanning also demonstrated calcification that was not visible on the plain skull radiographs in two of six patients who underwent CT scanning and had calcification.

Transcortical surgery for lateral ventricular tumors

“…The patients ranged from 3 to 35 years of age. The majority (27) of the patients were younger than 16 years of age. Fifteen patients were male and 14 were female.…”

“…20 Intraventricular homogeneous masses, which are revealed to engulf the choroid glomus on CT scanning and which are demonstrated to have a significant choroidal artery supply on angiography, are usually benign. 27,42 Central neurocytomas, which occur mostly in adults in the second to fourth decade of life, tend adhere to septum pellucidum and possess a characteristic CT and MR imaging appearance. On CT and MR imaging, the tumors tend to be primarily solid with some cystic regions, and contain calcifications and signal voids that represent tumor vessels.…”

Third Ventricular Meningioma -Case Report-

“…Meningothelial inclusion bodies are normally found in the arachnoid and choroidal tela, and meningiomas arise from this mesenchymal stroma of the choroid plexus. 8) Third ventricle tumors may arise from the tela of the velum interpositum, which is the space between the two layers of tela in the roof of the third ventricle that contains the posterior medial choroidal arteries and internal cerebral veins. According to the Brain Tumor Registry of Japan, 12th edition (1984)(1985)(1986)(1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000), the ventricles are rare sites for the occurrence of meningiomas (1.6% of all meningioma cases), the third (0.1%) and fourth ventricles (0.1%) are less common than the lateral ventricles (1.4%), because the choroid plexus is more bulky in the lateral ventricles.…”

Usefulness of Thallium-201 Chloride Single Photon Emission Computed Tomography for the Preoperative Diagnosis of Fourth Ventricle Meningioma-Case Report-

“…6) Most intraventricular meningiomas are located in the trigone of the lateral ventricle or the third ventricle. 18) Meningioma in the fourth ventricle is extremely rare, with only 25 reported cases. 1,5,6,[8][9][10]12,13,15,20,21) Accurate preoperative diagnosis can be difficult.…”