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Lactose intolerance is a problem that makes it hard to digest lactose. Lactose is a sugar found in dairy products. This condition

Lambert-Eaton syndrome (also called Eaton-Lambert syndrome) is a very rare condition in which a person's immune system attacks

Language delay means that a child is not able to use words or other forms of communication to share thoughts and feelings at the

Laparoscopy is a surgical technique in which a lighted viewing instrument (laparoscope) is inserted into the lower abdomen through

A laser is a highly focused beam of light that is used to cut or destroy tissue during a medical procedure. Laser light cleans

The lateral epicondyle is the bony extension at the bottom of the upper arm bone (humerus) on the outer side of the arm, next to

LDL (low-density lipoprotein) is sometimes called "bad" cholesterol. A high LDL cholesterol level can raise your risk for coronary

Exposure to lead paint (lead-based paint), which was widely used in many homes and apartments before 1978, can damage the body's

Lead poisoning is the name given to the harm caused by too much lead in the body, usually from months or years of exposure to

Oxygen-rich blood flows from the lungs through the left upper chamber (atrium) of the heart into the left lower chamber (ventricle