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Glossary

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  • Fulminant infectious mononucleosis

    Fulminant infectious mononucleosis (FIM) is a rare but life-threatening complication of Epstein-Barr virus infection that usually affects individuals with compromised immune systems. (Source: Postmortem diagnosis of fulminant infectious mononucleosis, Journal of Medical Society)

  • Fungi

    A group of micro organisms larger than either bacteria or viruses, which occasionally cause serious infection when your resistance is lowered.

  • G tube

    (... toob)

    A tube inserted through the wall of the abdomen directly into the stomach. It allows air and fluid to leave the stomach and can be used to give drugs and liquids, including liquid food, to the patient. Giving food through a gastrostomy tube is a type of enteral nutrition. Also called PEG tube and percutaneous endoscopic tube.

  • G-CSF

    A drug used under the brand names Neupogen, Zarxio, and Nivestym to treat neutropenia (a lower-than-normal number of white blood cells), prevent infection, and prepare the blood for the collection of certain types of blood cells, and under the brand name Granix to treat neutropenia. G-CSF is used in patients who have certain cancers and neutropenia caused by some types of chemotherapy and in patients who have severe chronic neutropenia that is not caused by cancer treatment. It is also used before an autologous stem cell transplant. G-CSF helps the bone marrow make more white blood cells. It is a type of colony-stimulating factor. Also called filgrastim and granulocyte colony-stimulating factor.

  • G6PD deficiency

    (… deh-FIH-shun-see)

    An inherited disorder in which a person doesn’t have enough of an enzyme called G6PD that helps red blood cells work the way they should. In G6PD deficiency, the red blood cells break down when the body is exposed to infection, severe stress, or certain drugs, chemicals, or foods. This may lead to a condition called hemolytic anemia. This disorder is most common in African-American men and in men of Middle Eastern or Mediterranean descent. Also called glucose-6-phosphate dehydrogenase deficiency.

  • GIST

    A type of tumor that usually begins in cells in the wall of the gastrointestinal tract. It can be benign or malignant. Also called gastrointestinal stromal tumor.

  • Gadolinium

    (GA-duh-LIH-nee-um)

    A metal element that is used in magnetic resonance imaging (MRI) and other imaging methods. It is a contrast agent, which helps show abnormal tissue in the body during imaging with a special machine.

  • Gallbladder

    (GAWL-bla-der)

    The pear-shaped organ found below the liver. Bile is concentrated and stored in the gallbladder.

  • Gamma globulin

    A protein component of blood plasma containing antibodies effective against certain micro organisms.

  • Gamma ray

    (GA-muh ...)

    A type of high-energy radiation that is different from an x-ray.