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Updated: May 9, 2026

3D Modeling of the Lateral Ventricles and Histological Characterization of Periventricular Tissue in Humans and Mouse
Published on: May 19, 2015
Imaging findings of intraventricular and ependymal lesions
L Vandesteen1, A Drier, D Galanaud
1Department of Neuroradiology, Pitié-Salpêtrière Hospital, AP-HP, 47-83, boulevard de l'Hôpital, 75013 Paris, France.
Abstract:
Intraventricular and ependymal lesions comprise a wide spectrum of tumoral, cystic, vascular, infectious and inflammatory disorders. With respect to tumoral and cystic diseases, the location, age and CT and MRI patterns are the main factors for diagnosis. The MRI findings of infectious diseases are supported by the clinical history, immune status and laboratory findings. Intracranial associated lesions may be very helpful for the diagnosis of Sturge-Weber, subependymal giant cell astrocytoma and systemic diseases, such as sarcoidosis and histiocytosis. Intraventricular vascular lesions are rare but present typical features on neuroimaging. The aim of this review is to provide a detailed description of these disorders with an emphasis on the key imaging findings and to generate a narrow differential diagnosis. We present a diagnostic approach based on the solid or cystic aspect of the intraventricular focal mass, its origin from the ventricular wall or choroid plexus and its location within the ventricular system. We also propose a differential diagnosis for ependymal dissemination: the ependymal enhancement may be due to ventriculitis from adjacent parenchymal lesions, the ependymal spread of tumors or infectious or inflammatory/systemic diseases.
Insights
This review details intraventricular and ependymal lesions, including tumors, cysts, infections, and inflammatory conditions. It emphasizes key neuroimaging findings for accurate diagnosis and differential diagnosis of these rare brain disorders.
Area of Science:
- Neurology
- Radiology
- Pathology
Background:
- Intraventricular and ependymal lesions encompass diverse pathologies: tumoral, cystic, vascular, infectious, and inflammatory.
- Diagnosis relies on location, patient age, and computed tomography (CT) and magnetic resonance imaging (MRI) patterns for tumoral and cystic diseases.
- MRI findings for infectious diseases are corroborated by clinical history, immune status, and laboratory results.
Purpose of the Study:
- To provide a comprehensive description of intraventricular and ependymal disorders.
- To highlight key neuroimaging findings for differential diagnosis.
- To present a diagnostic approach for intraventricular focal masses and ependymal dissemination.
Main Methods:
- Review of existing literature on intraventricular and ependymal lesions.
- Analysis of neuroimaging characteristics (CT and MRI).
- Development of a diagnostic strategy based on lesion characteristics and location.
Main Results:
- Tumoral and cystic lesions are diagnosed using location, age, and imaging patterns.
- Infectious lesions require integration of clinical, immune, and laboratory data with MRI findings.
- Associated intracranial lesions aid in diagnosing specific conditions like Sturge-Weber syndrome and systemic diseases.
Conclusions:
- A structured diagnostic approach, considering lesion morphology (solid/cystic), origin, and location, aids in differentiating intraventricular masses.
- Ependymal enhancement suggests ventriculitis, tumor spread, or infectious/inflammatory conditions.
- Accurate interpretation of neuroimaging is crucial for diagnosing the wide spectrum of intraventricular and ependymal lesions.
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