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ICP Intracranial pressure, harmful when increased. IICP Increased intracranial pressure. immunotherapy Use of the body's immune system to fight tumors. See biological response modifier. inaccessible See accessible. infiltrating Refers to a tumor that penetrates the normal, surrounding tissue. informed consent The right to have information explained to you so that you fully understand and agree to the nature of the proposed treatment. interstitial radiation therapy The implantation of radioactive seeds directly into a tumor. intra-arterial Injection into an artery (that may supply a tumor). intracerebral Located within the cerebral hemispheres (cerebrum). See extracerebral. intracranial Within the skull. intradural Beneath the dura mater. intramuscular Into a muscle. intrathecal Injection into the sub-arachnoid space of the meninges. Usually done by lumbar puncture. intratumoral Injection into a tumor (usually performed during surgery). intravenous Injection into a vein. intraventricular Injection into a ventricle. invasive Refers to a tumor that invades healthy tissues. The opposite of encapsulated. Also called diffuse or infiltrating. ipsilateral Affecting the same side. See contralateral. irradiation Treatment by ionizing radiation, such as x-rays, or radioactive sources such as radioactive iodine seeds. See radiation therapy. |