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Diseases & conditions A-Z List

Diseases & Conditions A-Z List - «M»:

  1. Millipede venom Millipede venom
    Millipedes are worm-like bugs called arthropods. Certain types of millipedes release a harmful substance (toxin) if they are threatened or if you handle them roughly. Millipedes can squirt toxin several inches. This is for information only and not for use in the treatment or management of an actual ...
  2. Mineral metabolism disorders Mineral metabolism disorders
    Mineral metabolism disorders are abnormal levels of minerals -- either too much or too little -- in the blood. Minerals are very important for the human body. They have various roles in metabolism and body functions. They are essential for the proper function of cells, tissues, and organs. Some mine...
  3. Minimal change disease Minimal change disease
    Minimal change disease is a kidney disorder that can lead to nephrotic syndrome, although the nephrons of the kidney look normal under a regular microscope. Causes Each kidney is made of more than a million units called nephrons, which filter blood and produce urine. In minimal change disease, ther...
  4. Miscarriage Miscarriage
    A miscarriage is the spontaneous loss of a fetus before the 20th week of pregnancy. (Pregnancy losses after the 20th week are called preterm deliveries.) A miscarriage may also be called a "spontaneous abortion." This refers to naturally occurring events, not medical abortions or surgical abortions....
  5. Miscarriage - threatened Miscarriage - threatened
    A threatened miscarriage is a condition that suggests a miscarriage might take place before the 20th week of pregnancy. Causes A small number of pregnant women have some vaginal bleeding, with or without abdominal cramps, during the first trimester of pregnancy. When the symptoms indicate a miscarr...
  6. Mistletoe poisoning Mistletoe poisoning
    Mistletoe is an evergreen plant with white berries. Mistletoe poisoning occurs when someone eats any part of this plant. Poisoning can also occur if you drink tea created from the plant or its berries. This is for information only and not for use in the treatment or management of an actual poison ex...
  7. Mitral regurgitation - acute Mitral regurgitation - acute
    Acute mitral regurgitation is a disorder in which the heart's mitral valve suddenly does not close properly, causing blood to flow backward (leak) into the upper heart chamber when the left lower heart chamber contracts. See also: Chronic mitral regurgitation Causes Regurgitation means leaking fro...
  8. Mitral regurgitation - chronic Mitral regurgitation - chronic
    Chronic mitral regurgitation is a long-term disorder in which the heart's mitral valve does not close properly, causing blood to flow backward (leak) into the upper heart chamber when the left lower heart chamber contracts. The condition is progressive, which means it gradually gets worse. See also:...
  9. Mitral stenosis Mitral stenosis
    Mitral stenosis is a heart valve disorder that involves the mitral valve. This valve separates the upper and lower chambers on the left side of the heart. Stenosis refers to a condition in which the valve does not open fully, restricting blood flow. Causes Blood that flows between different chamber...
  10. Mitral valve prolapse Mitral valve prolapse
    Mitral valve prolapse is a heart problem in which the valve that separates the upper and lower chambers of the left side of the heart does not close properly. Causes The mitral valve helps blood on the left side of the heart flow in one direction. It closes to keep blood from moving backwards when ...
  11. Mitral valve surgery - minimally invasive Mitral valve surgery - minimally invasive
    Blood that flows between different chambers of your heart must flow through a valve. This valve is called the mitral valve. It opens up enough so blood can flow from one chamber of your heart (left atria) to the next chamber (left ventricle). It then closes, keeping blood from flowing backwards. Mit...
  12. Mitral valve surgery - open Mitral valve surgery - open
    Blood that flows between different chambers of your heart must flow through a valve. This valve is called the mitral valve. It opens up enough so blood can flow from one chamber of your heart (left atria) to the next chamber (left ventricle). It then closes, keeping blood from flowing backwards. Mit...
  13. Mittelschmerz Mittelschmerz
    Mittelschmerz is one-sided, lower abdominal pain that occurs in women at or around the time of an egg is released from the ovaries (ovulation). Causes About 20% of women experience mittelschmerz, or pain associated with ovulation. The pain may occur just before, during, or after ovulation. There ar...
  14. Mixed tension migraine Mixed tension migraine
    Mixed tension migraine is a headache with features of both tension and migraine headaches. See also: Cluster headache Headache Migraine Tension headache Causes Migraine headaches affect millions of people. Tension headaches are even more common, affecting about 40% of the population. Peop...
  15. MMR vaccine MMR vaccine
    The MMR vaccine is a "3-in-1" vaccine that protects against measles, mumps, and rubella -- all of which are potentially serious diseases of childhood. One out of 30 children with measles develops pneumonia. For every 1,000 children who get the disease, one or two will die from it. Information WHO S...