Find answers to your health-related questions in our health encyclopedia.

  • Test

    C-reactive protein

    C-reactive protein is produced by the liver. The level of CRP rises when there is inflammation throughout the body. This article discusses the blood test...

  • Surgery


    The uterus is exposed through the abdominal wall, and an incision is made in the uterine covering. The muscles of the uterus are separated, producinga hole for the delivery of the infant. The infant is delivered through the opening in the uterine wall, after which, the uterus is stitched closed.

    A C-section is the delivery of a baby through a surgical opening in the mother’s lower belly area. It is also called a cesarean section.

  • Test

    C1 esterase inhibitor

    C1 esterase inhibitor (C1-INH) is a protein found in the fluid part of your blood that controls C1, the first component of the complement system. The...

  • Test

    CA-125 blood test

    The CA-125 blood test measures the level of the protein CA-125 in the blood.

  • Nutrition

    Caffeine in the diet

    Caffeine is a substance that is found in certain plants. It can also be man-made and added to foods. It is a central nervous system stimulant and a diuretic...

  • Poison

    Caffeine overdose

    Caffeine is a substance that exists naturally in certain plants. It can also be produced synthetically and used as an additive in food products. It is a...

  • Poison

    Caladium plant poisoning

    This article describes poisoning caused by eating parts of the Caladium plant and other plants belonging to the Araceae family. This is for information only...

  • Special Topic


    Cranial calcification is a disorder in which calcium that enters the body, which is usually absorbed by the bones and teeth, is deposited in another area of the body such as the brain.  Calcium deposits in the brain can cause problems in the organ and interfere with brain function.

    Calcification is a process in which calcium builds up in body tissue, causing the tissue to harden. This can be a normal or abnormal process.

  • Test

    Calcitonin blood test

    The calcitonin blood test measures the level of the hormone calcitonin in the blood.

  • Test

    Calcium - ionized

    Blood is drawn from a vein (venipuncture), usually from the inside of the elbow or the back of the hand. A needle is inserted into the vein, and the blood is collected in an air-tight vial or a syringe. Preparation may vary depending on the specific test.

    Ionized calcium is calcium in your blood that is not attached to proteins. It is also called free calcium. All cells need calcium in order to work. Calcium...