Astrocytoma Subependymal Glomerular

**Astrocytoma** is a malignant brain tumor consisting of glial cells derived from astrocytes, which are located in the subarachnoid space or patagina, where they are found under the brain. These tumors occur in old age, usually without any neurological impairment. Some cases of agallocystic astrocytomas require neurosurgical intervention and can be removed surgically.

One type of agalactic tumor, glioblastoma, is considered the most malignant tumor. Glioblastomas are characterized by strong infiltrative growth along the brain parenchyma with subsequent destruction of elements of the cerebral structure. The tumor grows rapidly, often extradurally, compressing the surrounding spaces, and can spread along with the cerebrospinal fluid into the subdural space. The patient's death usually occurs within six to nine months from the date of diagnosis, with

Subepdendymal glomerlocum astrocytoma is a tumor of extracerebral origin, which is localized at the junction of the meninges and the dura mater of the brain and the corpus callosum. This tumor is often discovered in early adolescence.

Tumor cells widely express glial markers both in the cytoplasm and on the surface (GFAP). After an immunohistochemical study, HLA-DR-positive lymphocytes with diffuse