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Ekim 29, 2026

Leukemia

Leukemia is cancer of the white blood cells. There are two types of Leukemias, acute and chronic. Learn about the differences and treatments available.
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Leishmaniasis

Leishmaniasis or leishmania, also known as Kala-azar is a parasitic disease spread by the bite of infected sand flies.
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Legionnaires’ Disease

Legionnaires' Disease (Legionella Pneumonia) is caused by bacteria. You get it by breathing in mist from water that contains the bacteria. Learn more.
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Leg Injuries and Disorders

Leg injuries and leg disorders can affect the whole leg or just one part. Read about common leg injuries such as sprains, strains, and fractures.
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Learning Disabilities

Learning disabilities affect how people understand, remember and respond to information. Learn more on how to identify and cope with learning disabilities.
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Lead Poisoning

Breathing air, drinking water or eating food that contains lead can cause health problems. Find a list of scenarios that can lead to lead poisoning.
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LDL: The “Bad” Cholesterol

LDL, or low-density lipoprotein, is the "bad" cholesterol. A high LDL level can lead to a buildup of cholesterol in your arteries.
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Latex Allergy

A latex allergy causes rashes, asthma, or even anaphylaxis. Hundreds of everyday products contain latex. Learn what you need to know to avoid latex.
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Laser Eye Surgery

Laser eye surgery (LASIK) is surgery to improve your vision. You may no longer need glasses or contacts. Learn about the types and who can get it.
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Lactose Intolerance

Lactose intolerance means that you cannot digest foods with lactose in them. Lactose is the sugar found in milk and foods made with milk. Read more.
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Laboratory Tests

Laboratory tests help doctors determine what is going on within your body. Many factors affect test results. Find a list of those factors.
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Knee Replacement

Knee replacement surgery (or knee arthroplasty) provides artificial knees in place of your damaged knees to restore function and relieve pain.
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