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Your knee joint is made up of bone, cartilage, ligaments and fluid. Muscles and tendons help the knee joint move. When any of these structures is hurt or ...
What is knee replacement surgery? Knee replacement surgery is a surgery to replace parts of your knee joint with new, artificial parts. You may need a ...
Laboratory tests check a sample of your blood, urine, or body tissues. A technician or your doctor analyzes the test samples to see if your results fall within ...
Lactose intolerance means that you cannot digest foods with lactose in them. Lactose is the sugar found in milk and foods made with milk. After eating foods ...
For many people, laser eye surgery can correct their vision so they no longer need
glasses or contact lenses. Laser eye surgery reshapes the cornea, the ...
Latex is a milky fluid that comes from the tropical rubber tree. Hundreds of everyday products contain latex. Repeated exposure to a protein in natural latex ...
What is cholesterol? Cholesterol is a waxy, fat-like substance that's found in all the cells in your body. Your liver makes cholesterol, and it is also ...
Lead is a metal that occurs naturally in the earth's crust. Lead can be found in all parts of our environment. Much of it comes from human activities such ...
What is a learning disability? Learning disabilities are conditions that affect the ability to learn. They can cause problems with: Understanding what ...
Your legs are made up of bones, blood vessels, muscles, and other connective tissue. They are important for motion and standing. Playing sports, running, ...
What is Legionnaires' Disease? Legionnaires' disease is a serious type of pneumonia caused by Legionella bacteria. The disease got its name when a group ...
Leishmaniasis is a parasitic disease spread by the bite of infected sand flies. There are several different forms of leishmaniasis. The most common are cutaneous and ...
What is leukemia? Leukemia is a term for cancers of the blood cells. Leukemia starts in blood-forming tissues such as the bone marrow. Your bone marrow ...
What are leukodystrophies? Leukodystrophies are a group of rare genetic disorders that affect the central nervous system (CNS). The CNS is made up of your ...
What is Lewy body dementia (LBD)? Lewy body dementia (LBD) is one of the most common types of dementia in older adults. Dementia is a loss of mental functions ...
People can lose all or part of an arm or leg for many reasons. Common ones include: Problems with the flow of blood through your body. These may be the result ...
Metabolism is the process your body uses to make energy from the food you eat. Food is made up of proteins, carbohydrates, and fats. Chemicals in your digestive ...
Listeriosis is a foodborne illness caused by Listeria monocytogenes, bacteria found in soil and water. It can be in a variety of raw foods as well as in processed ...
Your liver is the largest organ inside your body. It helps your body digest food, store energy, and remove poisons. Primary liver cancer starts in the liver. ...
Your liver is the largest organ inside your body. It helps your body digest food, store energy, and remove poisons. There are many kinds of liver diseases: ...
