Tests that examine the brain and spinal cord are used to detect (find) atypical teratoid/rhabdoid tumor.
The following tests and procedures may be used:
Physical exam and history
An exam of the body to check general signs of health, including checking for signs of disease, such as lumps or anything else that seems unusual. A history of the patient's health habits and past illnesses and treatments will also be taken.
A series of questions and tests to check the brain, spinal cord, and nerve function. The exam checks a person’s mental status, coordination, and ability to walk normally, and how well the muscles, senses, and reflexes work. This may also be called a neuro exam or a neurologic exam.
CT scan (CAT scan)
A procedure that makes a series of detailed pictures of areas inside the body, such as the abdomen or pelvis, taken from different angles. The pictures are made by a computer linked to an x-ray machine. A dye may be injected into a vein or swallowed to help the organs or tissues show up more clearly. This procedure is also called computed tomography, computerized tomography, or computerized axial tomography.
MRI (magnetic resonance imaging)
A procedure that uses a magnet, radio waves, and a computer to make a series of detailed pictures of areas inside the brain and spinal cord. This procedure is also called nuclear magnetic resonance imaging (NMRI).
A procedure used to collect cerebrospinal fluid from the spinal column. This is done by placing a needle into the spinal column. This procedure is also called an LP or spinal tap.
A procedure in which high-energy sound waves (ultrasound) are bounced off internal tissues or organs and make echoes. The echoes form a picture of body tissues called a sonogram. A renal ultrasound is used to check for AT/RT that may develop in the kidneys at the same time as in the brain.
INI1 gene testing
A laboratory test in which a sample of blood or tissue is tested for the INI1 gene.
Childhood atypical teratoid/rhabdoid tumor is diagnosed and may be removed in surgery.
If doctors think there might be a brain tumor, a biopsy may be done to remove a sample of tissue. For tumors in the brain, the biopsy is done by removing part of the skull and using a needle to remove a sample of tissue. A pathologist views the tissue under a microscope to look for cancer cells. If cancer cells are found, the doctor may remove as much tumor as safely possible during the same surgery. The pathologist checks the cancer cells to find out the type of brain tumor. It is often difficult to completely remove AT/RT because of where the tumor is in the brain and because it may already have spread at the time of diagnosis.
In order to tell the difference between AT/RT and other brain tumors, an immunohistochemistry study may be done on the sample of tissue that is removed. An immunohistochemistry study is a laboratory test in which a substance such as an antibody, dye, or radioisotope is added to a sample of cancer tissue to test for certain antigens.
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