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

  • Disease

    Kaposi sarcoma

    Kaposi's sarcoma on the foot. This once-rare malignancy of the blood vessels is now associated with AIDS. It is more frequently associated with AIDS in homosexual men than AIDS in IV drug users. The malignancy results in purplish grape-like lesions in the skin, gastrointestinal tract and other organs.

    Kaposi sarcoma is a cancerous tumor of the connective tissue, and is often associated with AIDS.

  • Test


    Karyotyping is a test used to identify chromosome abnormalities as the cause of malformation or disease. The test can be performed on a sample of blood, bone marrow, amniotic fluid, or placental tissue.

    Karyotyping is a test to examine chromosomes in a sample of cells. This test can help identify genetic problems as the cause of a disorder or disease.

  • Disease

    Kawasaki disease

    Kawasaki's disease can produce various rashes and skin manifestations.  This photograph shows mild swelling (edema) and redness associated with the disease. The hands and feet may be tender to touch and the skin may peel once the redness begins to fade.

    Kawasaki disease is a rare condition that involves inflammation of the blood vessels. It occurs in children.

  • Special Topic

    Keeping your medicines organized

    If you take a lot of different medicines, you may find it hard to keep them straight. You may forget to take your medicine, take the wrong dose, or take them...

  • Self-Care Instructions

    Kegel exercises - self-care

    Pelvic muscle strengthening exercises; Pelvic floor exercises

  • Disease


    Keloids are overgrowths of scar tissue that follow skin injuries.  Keloids may appear after such minor trauma as ear piercing.  Dark skinned individuals tend to form keloids more readily than lighter skinned individuals.

    A keloid is a growth of extra scar tissue where the skin has healed after an injury.

  • Disease


    The cornea is the crystal clear portion of the surface of the eye that lets light enter.  The cornea is well supplied with nerve endings which is why some people can never get used to wearing contacts.

    Keratoconus is an eye disease that affects the structure of the cornea. The cornea is the clear tissue that covers the front of the eye. With this condition,...

  • Disease

    Keratosis obturans

    The skin is the largest organ of the body.  The skin and its derivatives (hair, nails, sweat and oil glands) make up the integumentary system. One of the main functions of the skin is protection.  It protects the body from external factors such as bacteria, chemicals, and temperature.  The skin contains secretions that can kill bacteria and the pigment melanin provides a chemical pigment defense against ultraviolet light that can damage skin cells.  Another important function of the skin is body temperature regulation. When the skin is exposed to a cold temperature, the blood vessels in the dermis constrict. This allows the blood which is warm, to bypass the skin.  The skin then becomes the temperature of the cold it is exposed to.  Body heat is conserved since the blood vessels are not diverting heat to the skin anymore.  Among its many functions the skin is an incredible organ always protecting the body from external agents.

    Keratosis obturans is the buildup of extra skin cells and flakey skin in the ear canal. It may be associated with pain or mild hearing loss. It is usually...

  • Disease

    Keratosis pilaris

    Keratosis pilaris occurs most commonly during childhood and produces small, rough spots. called papules, that are typically the same color as the skin. They usually appear over the outer surface of the upper arms and thighs, but may also occur elsewhere on the body. Dry skin, especially during winter months, makes the condition worse. Keratosis pilaris tends to be inherited and may be associated with atopic dermatitis..

    Keratosis pilaris is a common skin condition in which a protein in the skin called keratin forms hard plugs within hair follicles.

  • Poison

    Kerosene poisoning

    Kerosene is an oil used as a fuel for lamps, as well as heating and cooking. This article discusses the harmful effects from swallowing or breathing in...