Articles

  • Disease

    Cavernous sinus thrombosis

    The sinuses are hollow cavities within the facial bones.  Sinuses are not fully developed until after age twelve.  When people speak of sinus infections, they are most frequently referring to the maxillary and frontal sinuses.

    Cavernous sinus thrombosis is a blood clot in an area at the base of the brain that contains a vein, which carries blood from the brain to the heart. This ar...

  • Test

    CBC

    Basophils are a specific type of white blood cell. These cells are readily stained with basic dyes (this is where the name comes from). Note the dark grains inside the cellular fluid (cytoplasm) of this basophil. Basophils make up only a small portion of the number of white blood cells but are important parts of the body's immune response. They release histamine and other chemicals that act on the blood vessels when the immune response is triggered.

    A complete blood count (CBC) test measures the following: The number of red blood cells (RBC count) The number of white blood cells (WBC count) The total am...

  • Disease

    Chronic lymphocytic leukemia (CLL)

    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.

    Chronic lymphocytic leukemia (CLL) is cancer of a type of white blood cells called lymphocytes. These cells are found in the bone marrow and other parts of t...

  • Disease

    Chronic myelogenous leukemia (CML)

    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.

    Chronic myelogenous leukemia (CML) is cancer that starts inside bone marrow. This is the soft tissue in the center of bones that helps form all blood cells. ...

  • Disease

    Congenital afibrinogenemia

    Congenital afibrinogenemia is a rare, inherited blood disorder in which the blood does not clot normally. It occurs when there is a protein called fibrinoge...

  • Disease

    Congenital antithrombin III deficiency

    Deep venous thrombosis (DVT) affects mainly the veins in the lower leg and the thigh. It involves the formation of a clot (thrombus) in the larger veins of the area.

    Congenital antithrombin III deficiency is a genetic disorder that causes the blood to clot more than normal. Antithrombin III is a protein in the blood that ...

  • Disease

    Congenital platelet function defects

    Blood clots (fibrin clots) are the clumps that result when blood coagulates.

    Congenital platelet function defects are problems with one of the blood elements needed for normal clots to form. These cells are called platelets. Congenita...

  • Disease

    Congenital protein C or S deficiency

    Blood clots (fibrin clots) are the clumps that result when blood coagulates.

    Congenital protein C or S deficiency is a lack of proteins C or S in the fluid part of the blood. The proteins are natural substances that help prevent blood...

  • Disease

    Congenital spherocytic anemia

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

    Congenital spherocytic anemia is a disorder of the surface layer (membrane) of red blood cells. It leads to red blood cells that are shaped like spheres, and...

  • Test

    Coombs test

    The Coombs test looks for antibodies that may stick to your red blood cells and cause red blood cells to die too early. A blood sample is needed. No special...

  • Special Topic

    Cytochrome b5 reductase

    Cytochrome b5 reductase is a blood enzyme that serves to maintain adequate iron levels in the red blood cells to maximize their oxygen-carrying capacity.

    Cytochrome b5 reductase is an enzyme in the blood. It controls the amount of iron in your red blood cells, and helps the cells carry the normal amount of oxy...