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A liver biopsy involves inserting a needle between the ribs to collect a small sample of liver tissue. Samples of liver tissue can

A living will, also called a declaration, is a type of advance directive. It documents your wishes about end-of-life medical

Lyme disease is an illness from getting bitten by a tick infected with a certain type of bacteria. It can cause fatigue, headache

A lymphocyte is a type of white blood cell that is produced in the spleen, tonsils, thymus gland, and the lymph nodes and other

Laparotomy is a procedure in which a surgeon makes an incision in the lower abdomen in order to inspect the abdominal cavity

In the United States, people are legally blind if their best eye has 20/200 vision or less with the help of glasses or contact

Learning disabilities can affect the basic processes involved in understanding or using the spoken or written language. They can

Mites belong to the family (arachnid) that includes spiders, ticks, and scorpions, but mites are barely visible with the naked eye

Most muscle strains (pulled muscles) are caused by overstretching muscles. Strains may be minor or severe, such as a torn muscle

Malocclusion means having crooked teeth or having upper and lower teeth that don't line up properly. It is usually caused by