Intraventricular schwannoma
Intracranial schwannomas have been reported in several unusual locations. Intraventricular schwannomas are rare primary brain tumors, with fewer than 25 cases reported in the literature.
The occurrence of intraventricular schwannoma could not be explained by one single theory and may be caused by several different and associated etiological mechanisms 1).
In 2018 a 68-year-old female with a large intraventricular lesion of the body of the lateral ventricle on the right side. Brain magnetic resonance imaging (MRI) revealed this lesion. After a right parietotemporal craniotomy, microsurgical excision using neuronavigation was performed to completely remove the tumor. Histological and immunohistochemical examination confirmed the diagnosis of intraventricular schwannoma devoid of atypical features. Postoperative MRI showed macroscopically complete tumor removal with no recurrence after 12 months of follow-up. A review of the literature identified 32 such cases published to date 2).
In 2015 Curran-Melendez Set al., presented the case of a 20-year-old male patient with a 2 year history of blurry vision and dysesthesia involving his right occiput and upper neck. Imaging demonstrated a homogeneously enhancing mass located within the atrium of the right lateral ventricle with associated right lateral ventricular entrapment. Pathology confirmed the tumor to be an intraventricular schwannoma. Imaging findings, presentation, complications, and treatment options for intraventricular schwannomas are described 3).