The fourth ventricle tumor

The fourth ventricle tumor Overview:
The fourth ventricle tumor is primary choroid papilloma mostly, the origin of the tumor in the brain wall is not only invasive growth of the fourth ventricle, and the regular violations of the brain stem or cerebellum, such as ependymoma and hemangioblastoma such. Ventricle of the tumor at the top of many of the vermis in the cerebellum to the majority of medulloblastomas. So when the fourth ventricle tumor, the first cycle of cerebrospinal fluid have blocked, the tumor extended to the periventricular or violations pressure surrounding tissue, that is, to produce clinical symptoms, the main symptoms of cranial nerve damage. Fourth ventricle tumors occur in children and young people.

The fourth ventricle is located under the screen within the posterior fossa, such as the shape of the tent-like cutting-edge upward. Department of the top pulp fan from before and after composition, dorsal to the cerebellum, the ventral pons and medulla oblongata for. Then the fourth ventricle on the midbrain, the bottom hole in the side connected with the subarachnoid space, and its position is equivalent to cerebellopontine angle in order to in-hole with the same cistern. Accept from the third ventricle the fourth ventricle through the midbrain to the cerebrospinal fluid flow, and through-hole or side hole in the flow of subarachnoid, and then through the arachnoid granulations into the venous system. Diamond-shaped at the end of the fourth ventricle, pons and medulla oblongata of the nerve nuclei of the adjacent and more with this, such as the medulla oblongata of the hypoglossal nucleus, dorsal vagal nucleus, cochlear and vestibular nuclei; pontine facial nerve nucleus, trigeminal motor nucleus and sensory nucleus of trigeminal nerve.

Causes of The fourth ventricle tumor:
The fourth ventricle tumor causes is unknown. If chromosome have cancer genes, coupled with various incentives to make fourth ventricle tumor occurred. Other causes of the fourth ventricle tumor are: genetic factors, physical and chemical factors and biological factors.