1. Intra-Axial Tumors:
Gliomas: One of the most common types of primary brain tumors arising from the brain tissue itself, gliomas arise from the supporting cells of the brain, the glial cells.
Astrocytoma: The most common form of glioma, arising from astrocytes.
Ependymoma: From the cells lining the ventricles in the brain.
Glioblastoma Multiforme (AKA grade IV glioma, malignant glioma): The most aggressive form of glioma.
Oligodendroglioma

2. Medulloblastoma and other Primitive Neuroectodermal Tumors (PNETs)
Hemangioblastoma
Medulloblastoma and other Primitive Neuroectodermal Tumors (PNETs)
Metastatic Brain Tumor: Cancers that spread from distant organs can also affect the brain.
Colloid Cyst
Hemangioblastoma is a tumor thought to be derived from cells that are precursors to blood vessels and/or blood cells. these brain tumors most frequently occur in the cerebellum, a part of the brain that is important for motor coordination and balance, and the spinal cord. some hemangioblastoma occur in association with a familial, hereditary disorder called von Hippel-Lindau (VHL) disease. autosomal dominant
Medulloblastoma is a brain tumor which occurs most frequently in children, accounting for about 30% of all pediatric brain tumors It is named for its site of origin, in an area called the superior medullary velum, which is associated with the midline of the cerebellum, a large part of the brain that is important for motor coordination and balance.
A colloid cyst is a benign brain cyst which typically occurs in the middle of the brain in an area called the 3rd ventricle, one of the fluid filled spaces within the brain. These cysts are not really tumors in the sense that they do not tend to continue to grow in size. They do not spread to other parts of the body. They consist of a thin cyst wall filled with soft material.

3. Extra-Axial Tumors: Arachnoid Cyst Chordoma Craniopharyngioma
Dermoid Cyst
Epidermoid Cyst
Meningioma
Pituitary Adenoma
Acromegaly (Growth Hormone Secreting Adenoma in adults)
An arachnoid cyst is a fluid-filled cyst that that occurs in the arachnoid membrane around the brain. While completely benign, and not a tumor per se, they can cause symptoms by compression of adjacent nervous system structures.
A chordoma is a rare tumor that is derived from primitive remnants of a developmental structure called the notochord. hordomas can occur anywhere along the vertebral column and base of the skull. However, the two most common locations by far are the sacrum (the bottom part of the spinal column and a part of the pelvis) and the clivus. The clivus is a bone of the skull, located at the base of the skull just in front of the brain stem and just behind the nasal cavities.
craniopharyngioma is a tumor which occurs in the region of the pituitary gland at the base of the brain. They very frequently contain areas of calcification as well as cystic areas which are filled with fluid. They can vary from predominantly solid to predominantly cystic and everything in between. hey generally occur in the region of the pituitary gland, known as the sella turcica, or simply sella. Commonly, they are largely in the supra-sellar region and can expand upward into the base of the brain in an area known as the hypothalamus. The optic nerves, the nerves carrying visual information from the eyes, are also in this region. dermoid cyst is generally a benign tumor which arises from ectodermal tissue during development. Ectodermal tissue are cells that give rise to the linings of the body, most notably the skin and all its appendages n epidermoid cyst is typically a benign brain tumor that arises from abnormal cells being left in the nervous system during development. Ectodermal cells that normally form skin are trapped in the developing nervous system, creating a cyst which is lined inside with ectodermal cells. CP angle is the most common site in the nervous system.

4. Extra-Axial Tumors: Cushing's Disease (ACTH Secreting Adenoma)
Endocrine Inactive Adenoma (NonSecreting Adenoma)
Gigantism (Growth Hormone Secreting Adenoma in children)
Prolactinoma
Rathke's Cleft Cyst
Schwannoma
Acoustic Neuroma (Vestibular Schwannoma)
Teratoma

5. Characteristics
Arachnoid Cyst
a fluid-filled cyst that that occurs in the arachnoid membrane around the brain.
compression of adjacent nervous system structures.
Chordoma
-a rare tumor that is derived from primitive remnants of a developmental structure called the notochord.
the two most common locations -are the sacrum (the bottom part of the spinal column and a part of the pelvis)
-the clivus ( a bone of the skull, located at the base of the skull just in front of the brain stem and just behind the nasal cavities)

6. Craniopharyngioma
-tumor which occurs in the region of the pituitary gland at the base of the brain.
- areas of calcification as well as cystic areas which are filled with fluid
-. known as the sella turcica, or simply sella
- largely in the supra-sellar region and can expand upward into the base of the brain in an area known as the hypothalamus (The optic nerves, the nerves carrying visual information from the eyes, are also in this region).
Dermoid Cyst
a benign tumor which arises from ectodermal (linings of the body, most notably the skin and all its appendages tissue) during development.

7. Epidermoid Cyst
a benign brain tumor that arises from abnormal cells being left in the nervous system during development. Ectodermal cells that normally form skin are trapped in the developing nervous system, creating a cyst which is lined inside with ectodermal cells.
cerebellopontine angle ( CP angle) is the most common site in the nervous system.
Meningioma
One of the most common primary brain tumors. It is almost always a benign tumor that arises from cells of the arachnoid membrane
Pituitary Adenoma
Rathke's Cleft Cyst

8. Schwannoma
Acoustic Neuroma (Vestibular Schwannoma)
on peripheral nerves, not in the brain or spinal cord itself.
Teratoma
A teratoma is a type of tumor which is derived from abnormal development of embryologic cell types.