Medications
Learning Center
Angina
Learn about a type of chest pain caused by reduced blood flow to the heart. This chest pain is a symptom of heart disease.
Angelman syndrome
Learn about this genetic disorder that causes developmental delays, problems with speech and other symptoms.
Anaphylaxis
Anaphylaxis, a severe allergic reaction, is an emergency. Learn who's at risk, what to watch for and what to do when it occurs.
Anal itching
Learn about the causes, treatment and self-care tips for this common, sometimes embarrassing condition.
Anal fissure
Learn what causes a tear in the anus and how to prevent or treat this often painful condition.
Anal cancer
Learn about this cancer that affects the anal canal and causes bleeding and pain. Treatment is usually with a combination of radiation and chemotherapy.
Amyotrophic lateral sclerosis (ALS)
This progressive nervous system disease, also known as Lou Gehrig's disease, destroys nerve cells.
Amyloidosis
This rare disease can affect different organs in different people. Find out how early and accurate diagnosis can lead to better outcomes.
Ampullary cancer
Learn more about the causes, diagnosis and treatments for cancer of the ampulla of Vater.
Amnesia
Read about what can cause memory loss and learn steps you can take to manage it.
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