Intraparenchymal Meningioma

Abstract

Meningiomas have been described as the most frequent extra-axial tumor in the brain. Most are benign and correspond to World Health Organization (WHO) grade I; however, there are some reports of cases that shows atypical locations, like subcortical intra-axial meningiomas. This represents a challenge in radiological diagnosis because it could be taken as a metastasis tumor or vascular malformations. The authors bring a case report of a previously healthy patient who presents a traumatic brain injury with no traumatic lesions. A computed tomography (CT) evidenced a left frontal rounded subcortical lesion surrounded by large vasogenic edema. The first diagnostic impression was a metastasis tumor. During surgery, a total resection was completed, and the appearance of the tumor was meningioma. This was later confirmed by histological analysis. The literature was reviewed in order to determine the importance of including intraparenchymal meningiomas in the differential diagnosis of intracranial lesions.

Intraparenchymal Meningioma, A Challenging Diagnosis: Case Report

“…Intra-axial meningiomas are extremely rare, their unusual intraparenchymal siteand the lack of dural adhesion make the presurgical diagnostic approach challenging [1]. Herein we report an unusual case of intraparenchymal meningioma that was not evocated preoperatively.…”

“…Meningiomas are typically extra axial lesions originating from the arachnoid cap and meningothelial cells present in the arachnoid layer of the meninges or Pacchionian granulations. They classically display dural attachment and easily diagnosed by CT and MRI [1].…”

A rare case of intra‐parenchymal meningioma in a female patient who presented with seizures: A case report

“…It is believed that they can develop from ectopic meningothelial cells in the stroma of the choroid plexus or the pia mater, which as a result of changes in cell migration, can cause intraventricular meningioma. It has been discovered that fibrous variants of intra‐parenchymal meningiomas are the most frequent, accounting for 44% of all cases 5 …”

“…It has been discovered that fibrous variants of intra‐parenchymal meningiomas are the most frequent, accounting for 44% of all cases. 5 …”

“…It has been discovered that fibrous variants of intra-parenchymal meningiomas are the most frequent, accounting for 44% of all cases. 5 It is quite challenging to appropriately diagnose these lesions, especially when they have rare meningioma traits,…”