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Types of Tumor Diagnosis

Oligodendroglioma Defined

Originally published on January 22, 2013
Most recently updated on April 10, 2013

Oligodendrogliomas occur in the oligodenrocytes, a type of supportive brain tissue.  They are most commonly found in the cerebral lobes of the brain.  They tend to occur in young and middle aged adults with a small population of children being diagnosed each year.  Pure oligodendrogliomas are rare but mixed gliomas; tumors made up of both oligodendrogliomas and astrocystes are more common.

Types:

Atypical Teritoid/Rhabdoid Tumor

Originally published on January 22, 2013
Most recently updated on April 10, 2013

Atypical teritoid/rhabdoid tumors (ATRT) are rare, high-grade tumors that occur most commonly in children under the age of 2.  They can be found in any part of the brain and tend to be aggressive.  They spread throughout the central nervous system.

Symptoms:

Ganglioglioma Defined

Originally published on January 22, 2013
Most recently updated on April 10, 2013

A ganglioglioma, also called gangliocytomas or ganglioneuromas, arise in ganglia-type cells, which are nerve cells.  They most commonly occur in the temporal lobe of the cerebral hemispheres, the third ventricle and less commonly in the spine.  They are well-defined tumors with distinct margins, are slow growing and are rarely malignant.

Symptoms:

  • Seizure are most commonly present

Treatments:

Treatment is typically surgery and may include radiation if a full resection is not possible.

Gliomas Defined

Originally published on January 22, 2013
Most recently updated on April 10, 2013

The glioma tumor, although not exactly the same, is very similar to an astrocytoma brain tumor and the names are often used interchangeably.  Please refer to our definition of astrocytomas for a detailed explanation of this tumor.

Choroid Plexus Tumor Defined

Originally published on January 22, 2013
Most recently updated on April 10, 2013

The choroid plexus is located within the ventricles of the brain and produces cerebral spinal fluid.  A choroid plexus tumor arises in this location of the brain. They account for approximately 1-3% of pediatric brain tumors and are most common in infants.

Types:

Optic Pathway Tumors Defined

Originally published on January 22, 2013
Most recently updated on April 10, 2013

Optic pathway tumors involve the optic nerve, which sends messages from the eye to the brain.  They are usually slow growing.  The visual pathway and/or hypothalmus are often affected.

Symptoms:

Primitive Neuroectodermal Tumors Defined

Originally published on January 22, 2013
Most recently updated on April 10, 2013

Primitive neuroectodermal tumors, or PNETs, account for approximately 5% of pediatric brain tumors. They are a group of highly malignant tumors composed of small round cells of neuroectodermal origin that affect soft tissue and bone

Types:

Pineal Region Tumors Defined

Originally published on January 22, 2013
Most recently updated on April 10, 2013

Germ Cell Tumors Defined

Originally published on January 22, 2013
Most recently updated on April 10, 2013

Germ cell tumors, also called germinomas, embroynal carcinomas, endodermal sinus tumors and teratoma, arise in the pineal or suprasellar region of the brain.  They are most often diagnosed around the time of puberty and are more common in boys than girls.

Symptoms:

  • In the case of suprasellar germ cell tumors, hormonal problems are commonly present
  • Pineal region tumors cause increased pressure on the brain, with headache and vision problems

Treatments:

Optic Nerve Glioma Defined

Originally published on April 18, 2011
Most recently updated on April 10, 2013

A glioma is a tumor that grows from glial cells, which are supportive cells in the brain.  Optic nerve gliomas grow specifically in the optic nerve which is the part of the brain that connects the eye to the visual center of the brain.  Optic nerve glioma can effect one or both optic nerves. 

Optic nerve gliomas are a type of pilocytic astrocytomas.

Type

Optic nerve gliomas are often slow growing and considered low grade or type I tumors. 

Symptoms:

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