Biol Psychiatry. PMC - Pubmed 6. J Ultrasound Med. Related articles: Anatomy: Brain. Promoted articles advertising. Figure 1: lateral view Figure 1: lateral view. Case 1 Case 1. Figure 2: anterior view Figure 2: anterior view. Case 2 Case 2. Case 5 Case 5. Case 8 Case 8. Cavum veli interpositi Cavum veli interpositi. Loading more images Close Please Note: You can also scroll through stacks with your mouse wheel or the keyboard arrow keys. Loading Stack - 0 images remaining. By System:. Patient Cases.
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American journal of neuroradiology. Cavum Septum Pellucidum. Continuing Education Activity The septum pellucidum meaning translucent wall in Latin - SP , also known as the ventricle of Sylvius, is a thin, triangular double membrane separating the frontal horns of the right and left lateral ventricles of the brain.
Introduction The septum pellucidum meaning translucent wall in Latin - SP , also known as the ventricle of Sylvius, is a thin, triangular double membrane separating the frontal horns of the right and left lateral ventricles of the brain.
Boundaries of SP: Superiorly - Inferior surface of the body of the corpus callosum Antero-inferiorly - Superior surface of the genu of the corpus callosum Posteroinferiorly - Corpus and columns of the fornix Laterally - Medial wall of frontal horns of lateral ventricles Medially - Virtual space with the contralateral septum Boundaries of CSP [1] Anteriorly - Genu of the corpus callosum Superiorly - Body of the corpus callosum Posteriorly - Anterior limb and pillars of the fornix Inferiorly - Anterior commissure and the rostrum of the corpus callosum and Laterally - Leaflets of the septum pellucidum.
Etiology The septum pellucidum is formed embryologically by two closely opposed leaves enclosing a cavity called the CSP. Pathophysiology Cavum septum pellucidum will not cause symptoms. There are mainly three mechanisms described: Ball-valve phenomenon - Obstruction of interventricular foramina by the cyst leading to hydrocephalus and increased intracranial pressure.
Compression of the hypothalamo-septal triangle formed by the specific septal, periseptal nuclei, and associated projection pathways - Leading to neuropsychiatric symptoms and compression of optic chiasm and pathways A chronic deep venous impairment - displacement and stretching of the internal cerebral and subependymal veins may cause progressive focal deficits.
CSP cysts can also classify as symptomatic or asymptomatic. Histopathology Cavum septum pellucidum has a lining of glial and neuronal cells. Evaluation Proper evaluation of cavum septum pellucidum requires magnetic resonance imaging of the brain. Three endoscopic approaches are described: [11] A frontal approach on the coronal suture 3 cm from the midline targeting the frontal horn of the lateral ventricle used by the majority of authors The same cortical frontal approach but directly targeting the cyst that is punctured and then a fenestration of the two walls is performed An occipital burr hole to optimize the trajectory into the atrium of the lateral ventricle, which would allow an approach both leaflets of the cyst perpendicularly.
CSP and CV were respectively and incorrectly called the fifth and sixth ventricles in the past. Both are not parts of the ventricular system as they have a different embryological origin and lack a lining with ependymal or choroid plexus cells.
SP is an important part of the limbic system, with prominent connections to both the medial and the basolateral limbic circuit. Disease affecting the CSP can cause symptoms either by mass effect or by disturbance of the emotional and behavioral functions of the limbic system.
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