Floor Of Third Ventricle Radiology

The floor of the fourth ventricle the rhomboid fossa see fig.

Floor of third ventricle radiology.

10 3 is formed by the pons and medulla fig. Although usually asymptomatic they can rarely present with acute and profound hydrocephalus. In the sagittal plane it has a complex fishlike shape created by two anterior and two posterior recesses and a curving roof and floor. These include the cerebellum covering about the middle third of the ventricle and the superior cerebellar peduncles and anterior medullary velum covering the rostral third of the ventricle.

They are suspended to the anterior tela choroidea and contain a colloid substance of variable viscosity. Colloid cysts of the third ventricle are benign tumors that comprise approximately 1 of primary brain neoplasms. The mammillary bodies and midbrain posterior to the tuber cinereum form the poste rior aspect of the floor of the third ventricle and do not normally enhance on mr images. The third ventricle lies in the midline of the diencephalon.

Most of the lateral walls of the ventricle are formed by the medial aspects of the two thalami which communicate in the midline along a band of gray matter known as the massa intermedia. Ct and mr imaging anatomy of the third ventricle. Floor and roof the floor is formed by the optic chiasma the tuber cinereum and the infundibulum the mamillary bodies the posterior perforated substance and the tegmentum of the midbrain. Like other ventricles the third ventricle has a cavity an anterior wall a posterior wall a floor a roof and two lateral walls.

In the axial and coronal planes it has a slitlike contour. If you do not. If you like the video than like it subscribe it and share with your friends. The necessity of their treatment is widely admitted.

In the patients with aqueductal stenosis or obstruction intraaqueductal csf flow is reduced or fully absent so endoscopic fenestration of the third ventricle floor provides an alternative quasi physiological csf flow pathway to the subarachnoid spaces through the interpeduncular cistern and downwards resulting in dispersed and minimized pressure gradient on midline brain structures surrounding cerebral aqueduct. Colloid cysts of the third ventricle are benign epithelial lined cysts with characteristic imaging features. Do not forget to click on bell icon and never miss the new video. The floor of the third ventricle.

These portions of the hypothalamus lack a blood brain barrier and typically enhance with gadolinium on mr images.