Articles

Find answers to your health-related questions in our Ilustrated Health Encyclopedia

  • Disease

    Macroamylasemia

    Macroamylasemia is the presence of an abnormal substance called macroamylase in the blood.

  • Disease

    Macroglobulinemia of Waldenstrom

    Lymphocytoid appearing plasma cell nucleus similar to a lymphocyte and cytoplasm similar to a plasma cell.

    Macroglobulinemia of Waldenstrom is a cancer of the B lymphocytes (a type of white blood cell). It is associated with the overproduction of proteins called...

  • Special Topic

    Macroglossia

    Structures of the throat include the esophagus, trachea, epiglottis and tonsils.

    Macroglossia is a disorder in which the tongue is larger than normal.

  • Special Topic

    Macrosomia

    Macrosomia is the condition of having an unusually large body. The body is in proportion, with the extremities and head also enlarged. Disorders that include this condition are gigantism and acromegaly.

    Macrosomia refers to a very large body size. It is often used to describe an oversized fetus.

  • Special Topic

    Macula lutea

    The macula is the yellow oval spot at the center of the retina (back of the eye) that contains blood vessels and nerve fibers.

    When an eye is looking directly at an object, light rays from that object are focused on the macula lutea, a yellow oval spot at the center of the (back of...

  • Disease

    Macular degeneration - age-related

    Macular degeneration is a disease of the retina that affects the macula in the back of the eye. The macula is important for clear central vision, allowing an individual to see fine details. There are two types of macular degeneration, dry and wet. Dry macular degeneration is more common and is characterized by the thinning of the retina and drusen, small yellowish-white deposits that form within the retina. The dry form of macular degeneration is usually mild. Wet macular degeneration can happen more quickly and be more serious. It occurs when vessels under the retinal layer hemorrhage and cause the retinal cells to die creating blind spots or distorted vision in the central vision. The disease becomes increasingly common amongst people in each succeeding decade over 50.

    Macular degeneration is an eye disorder that slowly destroys sharp, central vision. This makes it difficult to see fine details and read. The disease is most...

  • Symptoms

    Macule

    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.

    A macule is a flat, distinct, discolored area of skin that is usually less than 1 centimeter wide. It usually does not include a change in skin texture or...

  • Nutrition

    Magnesium in diet

    Magnesium is an essential mineral for human nutrition.

  • Test

    Magnetic resonance angiography

    Magnetic resonance angiography is an MRI exam of the blood vessels. Unlike traditional angiography that involves placing a tube (catheter) into the body, MRA...

  • Maindex