Hydrocephalus

A condition marked by an excessive accumulation of fluid resulting in enlarging of the brain cavities and raised pressure within the skull; may also result in enlargement of the skull and wasting of the brain. The abnormal buildup of cerebrospinal fluid in the...

Hyperfractionation

An increased number of smaller dosage treatments of radiation therapy. Radiation therapy that gives smaller doses (fractions) of radiation more often than standard radiation therapy so that the full treatment course can be given with fewer side effects. In...

ICP

Intracranial pressure, harmful when increased. Intracranial pressure monitoring is done using a device placed inside the head which senses the pressure inside the brain cavity and sends data to a recording device. There are three procedures to monitor intracranial...

IL-6

Interleukin-6. One of a group of related proteins made by leukocytes (white blood cells) and other cells in the body. IL-6 is made mainly by some T lymphocyte. It causes B lymphocytes to make more antibodies and also causes fever by affecting areas of the brain that...

Immunotherapy

Use of the body’s immune system to fight tumors. See biological response modifier. Treatment to boost or restore the ability of the immune system to fight cancer, infections, and other diseases. Also used to lessen certain side effects that may be caused by some...

Implanted Port

A catheter connected to a quarter-sized disk that is surgically placed just below the skin in the chest or abdomen. The catheter tube is inserted into a large vein or artery directly into the bloodstream. Fluids, drugs, or blood products can be infused or blood drawn...

Inaccessible

Refers to tumors that cannot be approached by surgical procedure. Tumors that are deep in the brain or beneath vital structures. Inaccessible tumors cannot be approached by standard surgical techniques.