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Radiopaedia.org, the peer-reviewed collaborative radiology resource
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The foramen of Magendie is a median aperture in the fourth ventricle that allows cerebrospinal fluid to flow into the subarachnoid space.
Colloid cyst of the third ventricle - Radiopaedia.org
Mar 31, 2024 · On all modalities, colloid cysts appear as a rounded, sharply demarcated lesion at the foramen of Monro, which range in size from a few millimeters to 3-4 cm 3. CT Typically seen as a well-defined, rounded lesion at the roof of the 3 rd ventricle:
Colloid cyst | Radiology Case - Radiopaedia.org
The rounded structure at the foramen of Munro is confirmed. The content of the cyst is hyperintense on T1, hypointense on T2 and demonstrates no central enhancement or restricted diffusion.
Third ventricle | Radiology Reference Article - Radiopaedia.org
Jul 31, 2024 · lateral ventricles via the foramina of Monro (interventricular foramina) lying just posterior to the columns of the fornix. fourth ventricle via the aqueduct of Sylvius (cerebral aqueduct) just below the posterior commissure. Boundaries
Hydrocephalus (summary) | Radiology Reference Article
Apr 2, 2018 · midline shift; mass at the foramen of Monro; bilateral lateral ventricles. 3rd ventricular mass; lateral and 3rd ventricles. aqueduct of Silvius obstruction; 4th ventricular mass; lateral ventricles, 3rd and 4th. most likely non-obstructive; Imaging. CT head | MRI brain. role of imaging. is there hydrocephalus? is it stable or progressive? (pre ...
Ventricular system | Radiology Reference Article - Radiopaedia.org
Jul 29, 2024 · interventricular foramen (of Monro): each lateral ventricle to third ventricle. cerebral aqueduct (of Sylvius): third ventricle to fourth ventricle. median aperture (of Magendie): fourth ventricle to cisterna magna. two lateral apertures (of Luschka): fourth ventricle to cerebellopontine angle cistern. obex: fourth ventricle into the central canal
Obstructive hydrocephalus | Radiology Reference Article
May 30, 2024 · In acute obstructive hydrocephalus, as is the case with a colloid cyst obstructing the interventricular foramina (of Monro), a sudden increase in intraventricular pressure can lead to rapid loss of consciousness and even death.
Subependymal cyst | Radiology Reference Article - Radiopaedia.org
Sep 30, 2022 · Subependymal cysts should be located below the external angle of the lateral ventricles (superior/lateral margin of the frontal horn) and posterior to the foramen of Monro. Post-hemorrhagic vs germinolytic (congenital) cysts are difficult to differentiate sonographically.
Hydrocephalus | Radiology Reference Article - Radiopaedia.org
Aug 12, 2024 · foramen of Monro: colloid cyst. aqueduct of Sylvius: aqueduct stenosis, tectal glioma. fourth ventricle: posterior fossa tumor, or cerebellar infarct or cerebellar hemorrhage Radiographic features
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