Acoustic neuroma (also called vestibular schwannoma) is a benign (non-cancerous), slow-growing tumor of the 8th cranial nerve (also known as the acoustic or vestibulocochlear nerve) which is responsible for hearing. Location Acoustic neuromas are usually

Astrocytomas are tumors that arise from astrocytes—star-shaped cells that make up the “glue-like” or supportive tissue of the brain. They are slow growing and tend to invade surrounding tissue and thus are known as “diffuse.”

Atypical Teratoid Rhabdoid Tumor, also referred to as ATRT, is a rare, high-grade tumor that occur most often in children age 3 and younger. They can appear as a large, bulky mass, tend to be

Chondrosarcoms are bone tumors that can occur in any bone in the body. They are found in the skull base (the area under the brain and behind the eyes and nose) between 1-6% of the

These tumors arise from brain tissue called the “choroid plexus,” the portion of the brain that makes the fluid which flows around the brain and spine. These tumors come in three “grades” based on how

A craniopharyngioma is a tumor arising from small nests of cells near the pituitary stalk. Craniopharyngiomas grow slowly and often become large before they are diagnosed. How malignant they are and how quickly they are likely

Just like a cyst anywhere else in your body, a cyst in the brain is a sphere filled with fluid—much like a balloon filled with water. They may contain fluid, blood, tissue, pus, or tumor

Diffuse midline glioma, H3K27-altered*, referred to as DMG, is a malignant glial tumor. It occurs in the midline of the brain or spinal cord and is most commonly seen in children. *80% of DMGs have

Ependymomas arise from the ependymal cells that line the ventricles of the brain and the center of the spinal cord. They are soft, grayish, or red tumors which may contain cysts or mineral calcifications. Ependymomas are

Germ cells are reproductive cells in a human embryo that may travel to different parts of the body during development, such as the brain, chest, and pelvis. If these cells grow abnormally, they can become

Glioblastomas (also called GBM) are malignant (cancerous) grade 4 tumors. The tumor is predominantly made up of abnormal astrocytic cells, but also contains a mix of different cell types (including blood vessels) and areas of

“Glioma” is a general term used to describe any tumor that arises from the supportive (“gluey”) tissue of the brain. This tissue, called “glia,” helps to keep the neurons in place and functioning well. There

Glioneuronal and neuronal tumors are a diverse group of rare tumors that come from nerve cells. Specific tumor types in this group include ganglioglioma, dysembryoplastic neuroepithelial tumor (DNET), central neurocytoma, and rosette-forming glioneuronal tumor, among others.

A hemangioma is an abnormal buildup of blood vessels in the skin or internal organs. Two types of hemangiomas are discussed here: Hemangioblastoma: These tumors are benign (non-cancerous), slow-growing, and well defined. They arise from cells

Lipomas of the nervous system are rare, benign (non-cancerous) tumors composed of fatty tissue. Lipomas in the brain are believed to be congenital abnormalities rather than true tumors and may be associated with other congenital

Medulloblastoma is the most common malignant (cancerous) central nervous system tumor of childhood. It is a fast-growing, high-grade tumor that may spread throughout the central nervous system. Medulloblastoma can be classified into 4 subgroups and

Meningiomas are often benign tumors arising from the coverings of the brain and spinal cord. They represent about one-third of all primary brain tumors and occur most frequently in middle-aged women. Meningiomas usually grow inward, causing

Neurofibromas are tumors of the nerve fibers. The term neurofibromatosis refers to two different genetic diseases characterized by skin abnormalities and nervous system tumors: Neurofibromatosis type 1: Also called NF-1 or Von Recklinghausen’s disease. Neurofibromatosis type

Oligodendrogliomas come from oligodendrocytes, one of the types of cells that make up the supportive, or glial, tissue of the brain. Oligodendrogliomas are generally soft, grayish-pink tumors. They often contain mineral deposits (called calcifications), areas

High-grade gliomas (HGG) are a group of aggressive brain and spinal cord tumors that occur in both children and adults and include such diagnoses as glioblastoma and anaplastic astrocytoma. These tumors characteristically grow (infiltrate) into

Pediatric low-grade gliomas (LGG) are a group of slow-growing tumors that can occur in numerous locations throughout the brain and spinal cord. They are the most common central nervous system tumors in children and adolescents.

Pineal tumors originate from normal cells in the pineal gland which is located in the center of the brain and is involved in the secretion of hormones such as melatonin. Many tumor types may involve

The pituitary gland is termed the “master gland” as it plays a key role in controlling the production of hormones from other organs such as thyroid hormone, cortisol, estrogens, and testosterone. It also produces its

Lymphoma is a cancer that arises from the cells of the lymphatic system. Primary CNS Lymphoma (PCNSL) is a rare type of diffuse B cell lymphoma that affects parts of the central nervous system. A

Primitive Neuroectodermal Tumor, also referred to as PNET, is a category of malignant (cancerous) tumors which appear similar under the microscope to medulloblastoma but occur primarily in the top part of the brain (the cerebrum).