Articles

  • Disease

    Hairy cell leukemia

    A small amount of bone marrow is removed during a bone marrow aspiration.  The procedure is uncomfortable, but can be tolerated by both children and adults.  The marrow can be studied to determine the cause of anemia, the presence of leukemia or other malignancy, or the presence of some "storage diseases" in which abnormal metabolic products are stored in certain bone marrow cells.

    Hairy cell leukemia (HCL) is an unusual cancer of the blood. It affects B cells, a type of white blood cell (lymphocyte).

  • Test

    Ham test

    The Ham test is a blood test done to diagnose (PNH). The test checks whether red blood cells become more fragile when they are placed in mild acid.

  • Test

    Haptoglobin blood test

    The haptoglobin blood test measures the level of haptoglobin in your blood. Haptoglobin is a protein produced by the liver. It attaches to a certain type of...

  • Test

    Hematocrit

    Blood transports oxygen and nutrients to body tissues and returns waste and carbon dioxide. Blood distributes nearly everything that is carried from one area in the body to another place within the body. For example, blood transports hormones from endocrine organs to their target organs and tissues. Blood helps maintain body temperature and normal pH levels in body tissues. The protective functions of blood include clot formation and the prevention of infection.

    Hematocrit is a blood test that measures the percentage of the volume of whole blood that is made up of red blood cells. This measurement depends on and the...

  • Disease

    Hemochromatosis

    Hepatomegaly is enlargement of the liver beyond its normal size.  Certain conditions such as infection, parasites, tumors, anemias, toxic states, storage diseases, heart failure, congenital heart disease, and metabolic disturbances may all cause an enlarged liver.

    Hemochromatosis is a condition in which there is too much iron in the body. It is also called iron overload.

  • Test

    Hemoglobin

    Hemoglobin is the most important component of red blood cells. It is composed of a protein called heme, which binds oxygen. In the lungs, oxygen is exchanged for carbon dioxide. Abnormalities of an individual's hemoglobin value can indicate defects in the normal balance between red blood cell production and destruction. Both low and high values can indicate disease states.

    The hemoglobin test is a blood test that measures how much hemoglobin is your blood. Hemoglobin is a protein in red blood cells that carries oxygen.

  • Disease

    Hemoglobin C disease

    Blood is comprised of red blood cells, platelets, and various white blood cells.

    Hemoglobin C disease is a blood disorder passed down through families. It leads to a type of anemia, which occurs when red blood cells break down earlier...

  • Test

    Hemoglobin electrophoresis

    This lab test measures the levels of the different types of the oxygen-carrying protein () in the blood.

  • Disease

    Hemoglobinopathy

    Hemoglobinopathy is a group of disorders passed down through families (inherited) in which there is abnormal production or structure of the molecule. Such...

  • Special Topic

    Hemolysis

    Hemolysis is the breakdown of red blood cells. See also: