Mass In The Roof Of The Fourth Ventricle

The fourth ventricle has a roof at its upper posterior surface and a floor at its lower anterior surface and side walls formed by the cerebellar peduncles nerve bundles joining the structure on the posterior side of the ventricle to the structures on the anterior side.

Mass in the roof of the fourth ventricle.

It is a low grade and slow growth astrocytic tumor which is usually located in the cerebellar hemispheres causing a mass effect in the fourth ventricle although in some cases it can extend into its interior. It corresponds to the ventral surface of the cerebellum. The obex is also a. This is lined by ependymal.

Csf produced and or flowing into the fourth ventricle can exit to the subarachnoid space through lateral apertures and a single median aperture located in the inferiorportion of the roof. The roof is composed of the cerebellum located at the back of the brain and the floor is formed by the rhomboid fossa a depression in the brainstem. This ventricle has a roof and a floor. The caudal tip of the fourth ventricle where it becomes the central canal is known as the obex.

At the median aperture there is direct communication with the subarachnoid space. The roof of fourth ventricle is the dorsal surface of the fourth ventricle. Typically in the trigone of children and fourth ventricle of adults. The posterior boundary or roof of the fourth ventricle is very thin and concealed by the cerebellum.

Treatment typically consists of surgical resection radiation therapy and chemotherapy with the prognosis strongly influenced by surgical resection the presence of csf metastases at the time of diagnosis and expression. The roof of ventricle is diamond shaped and can be divided into superior and inferior parts. The upper part of the roof is composed by a thin sheet of white matter the superior medullary velum that stretches between both superior cerebellar peduncles. Dr subhan iqbal and assoc prof frank gaillard et al.

The fourth ventricle has an anterior ventral floor with a characteristic diamond shape named the rhomboid fossa and a posterior dorsal tent shaped roof. There is a deficiency in the lower portion of the roof called the median aperture foramen of magendie. The roof of the 4th ventricle is tent shaped and has upper and lower sloping surfaces. The apex of the tent goes posteriorly into the white core of the cerebellum.

Intraventricular vividly enhancing mass. It consists of white matter referred to as the superior and inferior medullary vela. The roof of the fourth ventricle is tent shaped rising to an apex called the fastigium that divides the superior roof from the inferior roof. The upper portion of the roof is formed by the cerebellum.

Finding a vividly enhancing mass in the ventricular system has a limited differential including.