Most common site of sub ependymal astrocytoma (giant cell)
Subependymal giant cell astrocytoma (SEGA, SGCA, or SGCT) is a low-grade astrocytic brain tumor (astrocytoma) that arises within the ventricles of the brain. It is most commonly associated with tuberous sclerosis complex (TSC). Although it is a low-grade tumor, its location can potentially obstruct the ventricles and lead to hydrocephalus Subependymal giant cell astrocytoma (SEGA) is a slowly growing tumor of unknown histogenesis mainly arising in the periventricular regions adjacent to the foramen of Monro which causes increased intracranial pressure, seizures, and focal neurologic signs Ref Harrison20th edition pg 2456
Trigone of lateral ventricle
Foramen of munro
Temporal horn of lateral ventricle
4th ventricle
C.N.S